[@Raijinslayer] [s]Who needs willing wildlife?[/s] I guess if Swarm has them hang around him long enough, they'll get acclimatized to Ian's presence. Or, maybe it doesn't work on bugs? Folklorewise, vermin don't tend to react adversely to demonic presence, but that's probably your call if that applies here.

But I'm just gonna go ahead and say that the flies don't care one whit.