Orthorax, The Fallen Light

Flying, Vigilance, Menace
When this card enters the battlefield, you may
pay X. Then, Corrupt X with converted mana
costs X or less.
Whenever you corrupt a creature, deal damage
equal to its power to any target and you gain that
much life.
Whenever a corrupted creature dies, put a +1+1 counter on this creature.
The fallen always have a place. No matter how far they fall, they always find their way back up.