The Coral Altar of the Deep - AI-generated fantasy Encounter

The Coral Altar of the Deep

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Flooded CorridorRotating SigilKelp Stairs
Combat EncounterDND5E 2024Party L8 · 5 PCs

The Coral Altar of the Deep

Read Aloud

Water surges through the marble corridors as Thalassa Morwen turns the altar rings. Sahuagin slip from the kelp and merrow haul themselves up the stairs, while the black Sigil spins inside a tightening current. The runes flare once, then begin to go dark.

Battlefield Zones

1
Flooded Corridor

Flooded Corridor: 25 feet of knee-deep water, broken statues, and three-way cover.

2
Rotating Sigil

Altar Chamber: 25-foot domed room with the Sigil at its center and a rotating current around it.

3
Kelp Stairs

Kelp Stairs: 25 feet of slick steps descending into black water; movement here is difficult terrain.

Terrain Levers

  • Cut the kelp curtains to clear sightlines.
  • Jam the rotating current with a broken statue.
  • Turn the altar rings to restore one containment rune.
  • Shatter a coral pillar to create difficult terrain and cover.
  • Kick loose marble slabs down the stairs to block pursuit.
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Connections