Snake Trap

At-will, swift, touch; a Magic Trap effect. 1d6+4 venomous snakes appear in spaces within 2 squares of the trap and attack creatures of your choice. Snakes move 6 squares per round and provoke opportunity attacks normally. Each bite deals light piercing damage plus light poison damage, and the target suffers the same poison damage again at the start of each of its next 3 turns. Snakes have hit points equal to a light damage roll and resist 50% to area effects. They last up to 3 rounds.