Emendator

Islandwalk, Trample
Emenddator's toughness is equal to twice its
power. Emendator's power is equal to your
devotion to blue and black plus the number of creatures your opponent controls.
{5}{p/u}{p/g}: Monstrosity 5. ( If this creature isn't monstrous, put 5 +1/+1 counters on this
creature, then it becomes monstrous)
As long as Emendator is monstrous, it gains
hexproof and swampwalk.