It'd flood the entire place, and thats a-OK. The thing is immensely powerful, and could quickly take out the foes - which are clearly relying on dodging shenanigans. Diablo/Dracula/Grabner have much better durability than anyone on the other team, so if any them get taken out you know the other team is as well. Fortune is immune, so theres really no danger of it screwing over her own team. No reason not to use it.