If you hit a character using a Spell-Like Ability with a provoked Attack of Opportunity, they must make a concentration check - right? (Injured while Casting)
But what modifiers do they add tp their concentration check? They have no primary casting stat. Is it simply adding caster level? Would you assume their CL = their HD?
Charisma is the default casting stat for SLAs, and CL should always be stated.
Ah, I did not think to check the Bestiary (for some reason). Thanks fozbek.