Greed comes with an interesting kit, his basic attack is an AoE with a chance reduce magic resistance whilst still hitting hard. This is paired with a very cheap ultimate that either slows or deals increased damage. This makes him seem a bit random at first but with gear and awakenings the vulnerability is very easy to maintain and his ultimate guarantees both effects. He also gets stronger with consecutive kills and works so well with the cultist lord buffs. One of the better epic mages to obtain, but you have to invest to make him shine.