I was playing KornyKings. I used War Cry on his elf warrior. The card triggered him to discard his parries but it also triggered my Large Weapon trait, which the saving roll was not adequate and apparently "canceled" War Cry but kept the discard ability. Code: BATTLE LOG: Player=LeisureSuitLoli,Scenario=MP Vulcan Hoard,Room=LeisureSuitLoli vs KornyKings,RoomID=365265,Event=PlayAction,Action=War Cry,Instigator=Eila Ilmatar Juutilainen,Targets=Legrimedhros startTimer 1 1115 BATTLE LOG: Scenario=MP Vulcan Hoard,Room=LeisureSuitLoli vs KornyKings,RoomID=365265,Msg=ServerSelectCardsCommand::instruct selected card BATTLE LOG: Scenario=MP Vulcan Hoard,Room=LeisureSuitLoli vs KornyKings,RoomID=365265,Msg=ServerSelectCardsCommand::instruct selected card BATTLE LOG: Scenario=MP Vulcan Hoard,Room=LeisureSuitLoli vs KornyKings,RoomID=365265,Group=Legrimedhros,Event=Discard,Card=Parry BATTLE LOG: Scenario=MP Vulcan Hoard,Room=LeisureSuitLoli vs KornyKings,RoomID=365265,Group=Legrimedhros,Event=Discard,Card=Parry BATTLE LOG: Player=LeisureSuitLoli,Scenario=MP Vulcan Hoard,Room=LeisureSuitLoli vs KornyKings,RoomID=365265,Event=TriggerSucceed,Trigger=Large Weapon,TriggeringActor=Eila Ilmatar Juutilainen,AffectedActors=,TriggerType=Action,TriggerLocation=ActorAttachment BATTLE LOG: Scenario=MP Vulcan Hoard,Room=LeisureSuitLoli vs KornyKings,RoomID=365265,Msg=War Cry was cancelled.
Large Weapon triggers of off attacks and War Cry is an attack (red card) - but I believe the part you are reporting is the next bit? War Cry still takes effect, due to the "immediate" clause - which preempts cancelling. Complex! (probably working as intended, but interesting situation)
It would be good to know if that last bit is working as intended or is just a bug. (Eyes another entry for the Gotcha! FAQ...)
I suspect the devs intended it to work this way because they intentionally did the same thing with Staggering Blow. The discards occur even if the attack is blocked or dodged.
Presumably the same resolution applies to Defensiveness, if you could ever get a war cry onto a wizard.