When you spawn the boom, pass self (you, the spawner of boom) as instigator in SpawnActorOfClass node.
Now on the boom actor, when it explodes, pass damage to all Actors not equal to boom’s instigator
When you spawn the boom, pass self (you, the spawner of boom) as instigator in SpawnActorOfClass node.
Now on the boom actor, when it explodes, pass damage to all Actors not equal to boom’s instigator