Demon Origin has such a high percentage to burn ALL mana and deal TRUE damage. It's too easy to have demon combo because there are 7 demons and they are cheap. Burning ALL mana is too OP. For example, With 4 Demons, they have 50% to burn all mana so if 2 of them focus on 1 unit, that unit will have no chance to make a shot.
Demon Origin need a nerf on thier chance to burn mana and thier amount of mana burn (Burning ALL mana is too OP!!!)