Demonic summoning

The caster uses a raged weapon and hits the target, a 5 by 5 glowing red circle forms around the target doing 2d8 burning damage, the caster mutters the word "summon" and 2 Screaming Devilkin fly out of the circle and attack the barer of the circle. the if the barer survives the attack of the Devilkin, then their body is left with a circle scar wherever the caster casted the spell. the scar disappears if they die by any cause. the caster gets 2 times the reward of exp if they kill the target with the devils. when done with the spell, the caster gains 1 exhaustion point.