Level 8 HazardXP 350
Detect Perception DC 16 or Nature DC 24Initiative +8
Trigger: A creature enters a square in the area affected by the flash flood.
Attack (Opportunity Action): Close burst 10 (creatures in burst); +11 vs. Fortitude
Hit: 1d10 + 5 damage, and the targets falls prone and slides 8 squares downhill.
Miss: Half damage, and the target slides 4 squares downhill.
Detect: Perception DC 16 Success: Characters who make successful Perception checks at the edge of the flash flood area can add their Strength modifiers to their Fortitude defense against the attack made by the flash flood.
Published in Dungeon Magazine 189.