Giant Rat Trap

One action to set one trap (one square) in a 2 square radius around you (only you know its location)
Three turn cooldown.
When an enemy walks over it, they will be trapped immediately, must deal 30 melee damage to break the
cage. Protected from ranged attacks from other enemy
(but not yours).
Metalhead Strain BONUS:
When set trap, roll a D20. If 12-20, deal 3 damage per turn, and they are still immobile first turn after
breaking the cage.