Cass Mordane:
To the Pain sounds promising. Say 5 remaining hp or less?
We can do that, though not the DM's list :P
Call it concession or Unconsciousness whichever comes first. Full combat gear or unarmoured?
You are the one who was challenged after all.
Hopefully Marik has been practicing he's next ;)
Unless he would prefer to retract his statement :)