Hey everyone! I’m a DM from Italy, and I’m wrapping up my homebrew campaign soon. I wanted to share my homebrew final boss battle and epilogue to get your thoughts, feedback, and ideas on how to make it even more epic for my players.
Since English isn't my native language, I translated my campaign notes using AI. Keep in mind that without the full context of the entire campaign, a few story elements might seem a bit confusing—explaining all the backstory would be way too long!
I’d love to hear what you think about the mechanics, pacing, or overall vibe. Any feedback is super appreciated!
Party Overview (Level 10)
- Hahn: Fire Genasi Warlock
- Regadin: Dwarf Fighter
- Hunk: Half-Orc Cleric
- Maicus: Human Fighter (Note: All other characters mentioned in the notes are NPCs).
Alchemical & Visual Symbolism
- Octagon: Halfway between square (human) and circle (divine/infinity).
- Inverted Triangle ($\nabla$): Water.
- Upright Triangle ($\Delta$): Fire.
- Mercury: Connection between spirit and matter, liquid and solid.
- Circle with Central Point: Blood / biological gold.
- Black Sun: Darkness / Nigredo / rotting blood.
- Circle with Three Dots (Triangular): Skull / death.
- Hexagon: Eye / perfect natural tessellation.
- Spider: Weaver of fate / influence of Hahn.
INTRODUCTION – The Descent into the Arena
When you return to the throne room, the wall carved with the three symbols has vanished. In its place hangs a curtain of misted water, behind which you can faintly see a spiral staircase winding downward into darkness.
As you step through the veil of water, a cold shiver runs down your spine: you feel as though you are about to venture into something that will change you forever, one way or another. The bricks forming the steps and walls are as black as night, slicked with a thin, greasy layer of water and slime that leaves them slippery and treacherous.
As you descend deeper into the belly of the earth, the air turns increasingly hot and humid. It feels like stepping inside a living body—warm, breathing, contracting, and relaxing—while a slow, steady heartbeat echoes in your ears.
You keep descending for an immeasurable time; it could have been a few minutes or several centuries since you began your descent on this staircase. Suddenly, the air turns a faint violet hue. A few steps lower, the staircase ends, giving way to a short corridor. Beneath your feet, the slimy bricks are gone, replaced by damp, heavy soil that feels freshly turned by a plow. Ahead lies a stone archway, through which streams the same light you spotted a few steps back. The light is blinding now—or perhaps your eyes have simply grown too accustomed to the dark. Squinting as your vision slowly adjusts, you approach the threshold.
The landscape before you evokes a strange impression: a blend of desolation and peace, weighed in equal measure. A boundless plain of barren earth stretches to the horizon in every direction. Rising right from that horizon out of the black earth is a massive purple sun, frozen in an eternal sunset or an eternal dawn.
Bringing your focus closer, about a hundred meters ahead, your eyes catch the only feature rising above the flat terrain: a gnarled, twisted tree. Beneath it kneels a frail human figure with its back turned to you. Beside it are three other huddled figures, slightly smaller. Studying the silhouettes against the sun, you can see that the three smaller creatures wear bird-headed masks with long beaks. The single figure appears locked in prayer, hands raised to the sky, head tilted slightly back, long hair falling halfway down its bare back.
Slowly and laboriously, the figure pushes itself up, leaning on a sword. Like morning mist swept by the wind, the three surrounding creatures dematerialize into thin air.
The man beneath the tree turns toward you. He draws a deep breath, his shoulders rising and falling slowly:
“Finally... you arrived just in time.”
The ground feels heavy beneath your feet.
A heartbeat: THUMP-THUMP...
The tree is closer now.
A heartbeat: THUMP-THUMP...
Now you are just a few steps away from him.
Long, black hair clings to a pale face set in a resolute expression, though it poorly hides a shadow of doubt—or perhaps even fear.
A blast of warm wind sweeps over you. The three figures that vanished moments ago now surround you.
A heartbeat: THUMP-THUMP
They are upon you.
PHASE 1 – Frederik's Sacrifice
Frederik's previous look of doubt gives way to an apathetic, detached face, as if he were not risking his life—as if he were watching the fight from somewhere far away. He attacks wildly and erratically, striking anyone within reach and ignoring danger. His three minions form a triangle, maintaining their distance while pelting the party with Grave Bolts.
- Flower Bloom Mechanic: Whenever Frederik takes damage and bleeds, the blood drops floating from his body freeze in mid-air for an instant before shooting away to slam into the ground. Where they hit, a red flower blooms.
- Initiative Count 20: Each flower detonates in a small blast, releasing reddish pollen that heals Frederik for 3d6 HP. A flower can be destroyed by using an action to "attack" it, severing or uprooting it. Two turns after blooming, a flower naturally wilts.
Below 25% HP (Dreadful Aspect):
Frederik's eyes go blank for a moment, then a wide, unnatural smile spreads across his face. He begins furiously punching his own head with his gauntleted fist. You distinctly hear the sickening sound of tearing skin, crushing cranial bones, and the dull, wet pop of brain matter being squished. Frederik plunges his hand deep into the crater in his skull and pulls out—along with brain fragments—a bloody stag antler radiating a faint violet glow:
“I am the sacrificial stag, the one who will bring a new spring to the world.”
- Twisted Reckless Attack: From this moment on, Frederik gains advantage on all attack rolls, but his AC drops by 2.
When Frederik drops to 0 HP:
With a dull thud, Frederik's black sword embeds itself in the mud. His lifeless eyes stare at a point on the horizon:
“It will not be me who turns the world upside down... but my faith.”
He firmly grabs the horn protruding from his skull—now clean of blood and glowing with purple light—and snaps it like a dry branch. Gripping it with both hands, he drives it straight into his chest at heart level. A torrent of blood spouts from the wound, coalescing into an orbiting mass before exploding, knocking down everyone nearby. Blood spatters in all directions, causing flowers to bloom—even severed ones regain their color, bringing the total to 8. Meanwhile, the stream of blood continuing to flow from his chest thickens and begins dripping... upward, toward the sky.
(Note: If Frederik is somehow prevented from taking this action, one of the hags will cast Command, ordering every party member in a sweet, mesmerizing voice to kill Frederik. If the whole party succeeds on the saving throw, the voice simply commands: “Die,” and Frederik obeys, dropping dead).
PHASE 2 – Preparing the Ritual
The Hags:
- Eadar: Conjurer Wizard
- Leigas: Annis Hag
- Suil: Warlock of the Archfey
As Frederik's blood rises higher, the sky slowly darkens, forming a swirling spiral of dark clouds overhead. The vortex grows, blotting out the sun on the horizon and plunging the plain into shadow as a fierce wind picks up. A few feeble rays of violet light still filter through the thick cloud layer, and the air takes on the sharp scent of an impending storm.
The flowers, once vermilion red, begin pulsing with violet light. Their petals open fully to reveal glowing purple stamens. This light spreads down the stems to the roots, drawing glowing patterns visible through the soil (mercury). In turn, these patterns expand into lines of light across the ground, connecting all 8 flowers.
A voice, sweet yet metallic, crashes like thunder.
Eadar: “You served us well. You set our banquet table, and Frederik was a worthy main course.”
The voice comes from just above you. Nestled in the branches of the vermilion tree is a creature half-woman, half-demon: bare-skinned, adjusting an emerald-green drape hanging from her shoulder. Though her face boasts sensual, feminine features, her brow is "adorned" with four small horns. These bony growths extend to her shoulders, elbows, and feet, where they turn into razor-sharp talons. Her full red lips curve into a sly smile, revealing small, sharp teeth.
You hear a second voice—a soft whisper coming from afar.
Suil: “We invested heavily in you, and you did not disappoint.”
The speaker is another woman, also bare, covered only by her incredibly long hair, which shifts from blood-red at the roots to pitch-black at the tips. Her skin—white as sun-bleached bone and pale enough to reveal the underlying veins—changes color below the knees, turning black, shriveled, and papery. Her eyes are solid black, her gaze fixed on a point just above your heads.
Then a third voice, sounding like a knife scraping across ceramic, rasps from behind you.
Leigas: “And for all of this, we thank you. But your task is done now. You may rest.”
What looks like a woman's corpse points toward the stone doorway you came from. Her body is draped in tattered black rags. Instead of hair, her head is a dense thicket of brambles that extends down over much of her body. Her face looks truly dead: grayish skin, yellow sclerae for eyes, and a rotted cheek that exposes sharp teeth.
- Social Interaction Branch: If the party does not attack, Eadar stalls until the spell circle is complete, while Leigas circles furiously and Suil watches silently.
- Leigas: “You insult this place! Leave... NOW!”
- Eadar: “Sister! Your impatience will destroy us!”
- Aggressive Branch: If the party attacks, Eadar says in a bored tone: “Why make something so simple so difficult? You were such good servants until now...”
The Seal Completion:
As combat rages, the light from the flowers expands across the ground, first drawing an octagon connecting all 8 flowers. Once completed, a thin line of light shoots out counterclockwise from one of its vertices, drawing a circle through all the flowers. The moment it loops back to its starting point (after 5 turns, including dialogue), Eadar snaps her hand toward Suil: your shadows instantly darken, stretch, and swell until they engulf the entire area, leaving you blinded in absolute blackness.
A few seconds pass before the darkness dissipates. The three women are gone; instead, four figures surround you. You recognize Hector, the Prospector, the Snake Woman, and Frederik—everyone who sat at the dining table. In the distance, Eadar, Suil, and Leigas stand positioned around the glowing octagon, arms raised toward the black sky. Bright hexagons bloom at their feet, shooting out three lines of light across the dirt that meet in the center to form an inverted triangle ($\nabla$).
- Hag Barrier: A swirling tempest of wind wraps around the three hags, blocking physical and magical attacks alike. This barrier has 50 HP and reflects 10 damage back at anyone who hits it.
PHASE 3 – The Ritual Begins & Planar Shifting
- Turn 1: The 4 shadow figures surrounding you look strange—tangible and ethereal all at once. You see their outlines, but they quiver and bleed: like masses of water and blood rising from the dirt, flowing upward like inverted waterfalls. They make no sound, save for a unified whisper—a drone echoing from their bodies. Beneath your feet, deep in the earth, something churns. A low rumble grows rapidly.
- Turn 2: The subterranean roar deafens, and the ground shakes violently with heavy tremors. The earth splits (DC 15 Dexterity saving throw or fall prone), breaking apart and rising to form floating "islands" suspended by a slimy, violet sludge pulled upward in thin, delicate filaments. The distant chant reaches an unbearable volume.
- Turn 3: A sudden crack of thunder splits the air... then rain. A few scattered drops turn into a torrential downpour. The howling wind sweeps in all directions (DC 10 Athletics check or fall prone); keeping your eyes open against the lashing rain is painful.
Wetted by the rain, the floating islands shift between planes each round:
| Plane |
Island Effect |
Shadow Minion Effect |
| Shadowfell |
Gloomy. Disadvantage on mental attribute saving throws (INT/WIS/CHA). |
Shadows gain resistance to all damage. Destroying a shadow grants resistance to all damage against the next incoming attack. |
| Feywild |
Rain turns into mid-air dew. Dense vegetation erupts. Wisdom saving throw or Hideous Laughter. |
Shadows sprout strange growths and gain Color Spray. Destroying a shadow grants advantage on your next attack roll. |
| Ethereal Plane |
Island phase-shifts. Targeting across islands incurs disadvantage and deals half damage. |
Hitting a player teleports them to another island. Destroying a shadow allows a player to teleport next to an ally. |
| Astral Plane |
Shifting fog. Gravity vanishes: movement distance is doubled, allowing massive leaps. |
Hitting a player knocks them back 15 ft (4.5m). Destroying a shadow makes you immune to opportunity attacks until your next turn. |
Combat Phase 3 Ends When:
- All four shadow figures are destroyed in the same turn, OR
- Round 6 is reached, completing the hags' ritual.
PHASE 4 – Final Confrontation & Ascension
Through the storm, 4 glowing circles appear inside the triangle—one large central circle, and 3 smaller ones arranged in a triangular layout. The three women step toward the center and join in a tight embrace, whispering in unison: “Mother...”
They strike with synchronized speed: each plunges her fist deep into the chest of the sister to her right, pulling out beating hearts before collapsing dead.
The rain wall drops. Silence.
The amorphous mass of blood, tears, and prayers pools above the sacrificed sisters, shaping into a giant fetal figure that grows at an impossible rate into a tall, emaciated female frame. Where its face should be, there is only a dark void housing a tiny, burning star. The dead hags' blood hardens into a solid staff that flies into its hand, casting a massive protective sphere of rain and wind. (Reskinned Star Spawn Larva Mage)
Turn 2 of Phase 4:
The clouds tear open above to reveal the monumental silhouette of Silverymoon hanging upside down in the void. The Veil between planes is tearing apart—the inverted city crumbles under the lashing rain as it plummets toward the arena.
HAHN'S TRANSFORMATION (Warlock Character Arc)
Kabuth whispers in Hahn's ear:
“The long-awaited moment has arrived... this is the power that will restore our people to greatness. Step across the threshold of the seal and surrender yourself to me.”
The moment Hahn steps into the seal, the rain turns into embers, and her belly glows white-hot.
Kabuth: “Hahn, the time has come... since birth you have lived on the edge between two planes, the division and nexus of two worlds. Now you must let the barrier fall. Let me flow through you and through the rain, and we shall be reborn as the God I have always been.”
Hahn's Choice:
- Share her body with her patron: Unleash Kabuth's true power, remaining two souls sharing one vessel.
- Overpower the patron: Through sheer force of will, absorb Kabuth's power, erasing him from existence and ascending as a living deity on earth.
The Alchemical Mutation: The inverted triangle ($\nabla$) rotates 180 degrees into an upright fire triangle ($\Delta$). The central black sun distorts into a giant spider reaching toward the octagon's vertices.
Hahn's body breaks and shifts, forging into pure flame as ancient divinity surges through her veins.
PHASE 5 – Epilogue
The massive boss freezes. The star in its face turns to dull black crystal, and its body liquefies into a viscous, silvery puddle alongside its staff.
Hags' Final Echo: “Mother, we return to your womb. Welcome your fallen daughters; this time, absolute oblivion awaits us all, and none shall remain to remember us.”
The falling upside-down city freezes mid-air. The storm clouds turn to fire and collapse straight into Hahn's navel.
(Player Interactions)
A voice calls out:
“Well now, it's time to settle your debts.”
Dorn stands before you, holding a small jar. He unseals it, causing a sharp flash of memories—the rain, the hags, the mines—before total darkness takes over.
“I grant you safe passage once more. This time, back to life.”
...You wake up in Belpur under a bright azure sky. Reconstruction is underway; familiar faces go about their day. You look at each other—exhausted, scarred, beaten... but when you try to remember why you are there or what you fought, there is only a hollow void.
The names of the hags, the texture of the dark rain, and the face of the Vessel are gone, sealed away in a jar across the multiverse.
You are the forgotten heroes of a story no one will ever tell.
Hans smiles from nearby, turning to Hahn:
“I think I'll head south. Something tells me they're going to need me down there very soon.”
Questions for the Community / Feedback Requested!
I'd love to get some insight from fellow DMs on a few specific mechanical and narrative points:
- Phase 3 Planar Mechanics: Do the rotating planar effects on the floating islands seem readable for players, or does it risk causing too much paralysis/cognitive overload during a climactic fight?
- Phase 1 Flower Healing: Is 3d6 HP per flower too punishing/slow for a 4-player party at Level 10, or does forcing them to spend actions uprooting flowers create good tactical tension?
- Pacing & Atmosphere: How does the transition from the alchemical horror (Frederik's skull horn) to the planar apocalyptic finale (inverted Silverymoon) feel to you? Does the shift feel earned?
Thanks in advance for reading through this massive post! Looking forward to your advice and ideas
