Alex
Arcane
Guessing the guy with the mace is a cleric and he's cast protection from evil?
I dunno, the effect the image brings doesn't much match with protection from evil. The idea seems to show that he is immune to the arrows, but I don't know what cleric spell would fit well with that. I think protection from normal weapons might fit the bill, but that is an arcane spell, not a divine one. Maybe it is a spell from some sourcebook, or even one specific to an adventure?