Question about killer The Artist

I'm having trouble figuring out how and when the birds she sends out can injure someone. So I thought if she sent out birds they would be on you and if she sent out another swarm of birds that would injure you. Perhaps it was a bug or maybe she has an add-on that allows the first swarm of birds to instantly injure you? I was against her on the swamp map and I didn't see that she had an add-on that affected that but maybe I misinterpreted the power/add-ons. How do they commonly injure survivors?