Soul, Aetherborn Sylex

X: Soul, Aetherborn Sylex deals X damage to you, where X is the number of charge counters on them.
-2: Soul, Aetherborn Sylex deals 2 damage to any target, and you gain 2 life.
-20: Exile all other coloured creatures and planeswalkers. They cannot be regenerated. Remove all charge counters from Soul, Aetherborn Sylex.