In a recent battle my rogue was in, I knocked out a wizard with one of my favorite powers.. uh.. Knockout. The text says:
Hit:...and the target is knocked unconscious (save ends). If the unconscious target takes any damage, it is no longer unconscious.
Deciding I didn't like sleeping Wizards I then unleashed my other favorite Circling Predator:
Hit: 1[W] + Dexterity modifier damage.
Effect: You can shift 1 square and must end adjacent to the target. Then make a secondary attack against it.
Secondary Attack: Dexterity vs AC
Hit: 1[W] + Dexterity modifier damage, and you gain combat advantage against the target until the end of your next turn.
The group all agreed that I would get a Coup De Grace on the first hit, for sure. What we weren't sure about is whether the second attack of the Circling Predator power allows for a second Coup De Grace. My gut instinct is no, but I was curious what the rules say about it.
Can you perform two Coup De Grace's against an unconscious opponent who wakes after taking damage, if it's with a single power?