I've never had this successfully trigger. I'm taking it out of my deck until further notice because it just doesn't seem to work. I've had a variety of different attacks (most melee) blow right through it.
The card only triggers vs attacks that would kill the character, not any others. Is this what it was failing to do?
I think he means this: http://www.cardhunter.com/forum/threads/guardian-angel-failed-to-activate.1949/#post-21769
I suppose a bugreport will clarify everything best (http://www.cardhunter.com/forum/threads/please-read-how-to-report-bugs.331/). Hope it helps.
I just saw it work correctly... for the ai: BATTLE LOG: Player=kalin,Scenario=Mother Lode,Room=WHST (kalin),RoomID=81628,Event=PlayAction,Action=Firestorm,Instigator=Amthien,Targets= BATTLE LOG: Player=kalin,Scenario=Mother Lode,Room=WHST (kalin),RoomID=81628,Event=TriggerSucceed,Trigger=,TriggeringActor=Pokkin,AffectedActors=Pokkin,TriggerType=Action,TriggerLocation=Hand BATTLE LOG: Scenario=Mother Lode,Room=WHST (kalin),RoomID=81628,Msg=Pokkin, health = 4 (pi:1, gi:2, ai:0) blocks Firestorm BATTLE LOG: Scenario=Mother Lode,Room=WHST (kalin),RoomID=81628,Msg=Gary drew a card for Pokkin BATTLE LOG: Scenario=Mother Lode,Room=WHST (kalin),RoomID=81628,Group=Pokkin,Event=Discard,Card=Lifesaving Block