So I took his minion that gives him immunity with mind control (imgur / FMRPaA1) and the hero was still immune. I couldn’t attack him in any way (imgur / qDqbwDg). After few rounds I killed all his minions that gave him immunity (I still don’t know its name) and I was able to kill him, however the minion that I took with mind control was unable to attack (imgur / Rbmhw3b).