Leeching Sludge

Whenever a creature is dealt damage by Leeching
Sludge exile it with a devour counter on it.
{u}{b}{g}: Put target exiled creature with a devour
counter on it into it's owners graveyard, it
perpetually gains "This creature has base power
and toughness of 2/2 and it an ooze in addition
to it's other types". Either gain 2 life or put two
+1/+1 counters on Leeching Sludge.