Poison Trap

Description
A trap that sprays a fog of poisonous gas when stepped on.

Usage
This trap will activate when stepped on, and any unit within a one tile radius in the next 5 seconds will be inflicted with a poison effect, which can only be stopped by Healer units. In approximately 40 seconds, all affected units will be dead. It is extremely effective at large groups of units moving through it, though is useless against shielded units due to their poison resist.