Angelic Protection

The caster touches any willing good aligned creature. The creature gains 1d12 temporary hit points and + 2 to AC. When the temporary hit points are reduced to 0 the armor class bonus disappears and a 20 ft cube explosion happens around then creature affected by the spell. All enemies of the creature must make a successful constitution saving throw against the caster's (not affected creature's) spell save DC or take 2d10 +3 radiant damage, or half as much on a successful save.