[quote=Polyphemus]
I don't know what she's going to do. Guess we need to find who put it up in the first place and take care of him/ her/ it.
[/quote]

Exactly. Killjoy, while able to blow explosives up with her mind, has to actually [i]place[/i] the explosives there if something isn't already available (like a gas pipe or propane tank lying around). If Killjoy doesn't even know who's putting up the field, she's useless.

Figure out who it is, and Agnes can scan for something that could take down the wizard emanating the field, or ask for someone to implant an explosive nearby them for her to detonate.