The 4th Edition Assassin class has a Level 6 Utility Power Called Vanish:
Encounter - Immediate Reaction
Keywords: Shadow, Teleportation
Trigger: You are hit by an attack.
Effect: You become invisible until the start of your next turn, and you teleport up to your speed.
My question is: does the assassin take damage from the attack that triggered Vanish? Or do they get to Vanish after a successful attack roll but before damage is dealt?
Interested to hear ruling interpretations on this.