Thalassophobic Pool

Complex

Magical

Trap

Stealth

DC 25 (trained)

Disable

DC 32 (master) Diplomacy or Deception to quell the fear and calm the pool or DC 35 Intimidation to give the pool something worse to fear; three successes required.

Downpour [Reaction]

Routine

(3 actions) Water from the chalice increases the depth of the water by 10 feet for each action. Each time this happens, creatures in the pool are pushed 10 feet down and take 1d6 bludgeoning damage. As the pool has no bottom, creatures in it can fall down indefinitely; they must Swim up to avoid drowning, but the water is especially choppy, so the Athletics DC is 25. The pool never overflows.