You disappear as your enemy misses, leaving a cloud of poison behind.

Encounter   ✦     Arcane, Implement, Poison, Teleportation
Immediate Reaction      Close burst 1

Trigger: An enemy misses you with an attack

Target: Each creature in the burst

Attack: Charisma vs. Fortitude

Hit: 3d10 + Charisma modifier poison damage.

Effect: You teleport 10 squares.

Published in Player's Handbook 2, page(s) 145.