touch of dead don't trigger unholy wellspring

Hello,

I have unholly wellspring on me and playTouch of dead, but touch of dead don't receive the 4 damage bonus.
battle log :


BATTLE LOG: Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Msg=The active player is now Platouf
stopTimer 1 886
BATTLE LOG: Player=Platouf,Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Event=PlayAction,Action=Touch of Death,Instigator=Helga,Targets=Blessed Anrime
startTimer 0 1200
stopTimer 0 1200
startTimer 1 886
BATTLE LOG: Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Msg=Blessed Anrime took 10 damage
BATTLE LOG: Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Msg=The active player is now Amy
BATTLE LOG: Player=Amy,Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Event=PlayAction,Action=Devastating Spark,Instigator=Mingolborn Pain-bringer,Targets=Thagibryn
BATTLE LOG: Player=Amy,Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Event=TriggerFail,Trigger=Missile Block,TriggeringActor=Thagibryn,AffectedActors=Thagibryn,TriggerType=Action,TriggerLocation=Hand
BATTLE LOG: Player=Amy,Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Event=TriggerSucceed,Trigger=Impenetrable Nimbus,TriggeringActor=Thagibryn,AffectedActors=,TriggerType=PreDamage,TriggerLocation=ActorAttachment
BATTLE LOG: Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Msg=Thagibryn took 0 damage
BATTLE LOG: Scenario=MP Forest,Room=Platouf vs Amy,RoomID=7241,Msg=The active player is now Platouf


Friendly,
Platouf.