Does it work against just 2 enemies? (I think I see 3 elementals in those pictures)

If so, it could be that it's working as intended, but the description is wrong. Or its bugged, and can't handle more than 2 enemies for some reason.

https://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=535269#Post535269

Ignoring tx3000 since Aug '14!