Thunderstone Cascade Trap
Level 7
A trip wire strung across the path, wired to a cache of thunderstones that detonate in a deafening cascade the moment the line is touched.
In play
Disable DC 27 Thievery (expert) to safely cut the trip wire
Thunderstone Explosion [Reaction]
Level 7 · Complexity Simple
Stealth DC 25 (expert)
Disable Thievery DC 27 (expert) — to safely cut the trip wire
AC 26
HP 54 · Hardness 0
Immunities critical hits, object immunities, precision damage
Trigger The trip wire is disturbed
Effect Several thunderstones bounce down the stairs and explode. Each creature within 10 feet of the lower half of the stairs takes 6d10 sonic damage (DC 24 basic Fortitude save). Creatures that fail this save are additionally deafened for 1 minute; creatures that critically fail this save are instead deafened for 1 hour.