Gutter Glob

{b/g}: Gutter Glob becomes a Skeleton Ooze with
base power and toughness 2/2.
{b/g}{b/g}{b/g}: If Gutter Glob is a Skeleton, it becomes
a Skeleton Ooze Giant with base power and
toughness 4/4 and deathtouch.
{b/g}{b/g}{b/g}{b/g}{b/g}: If Gutter Glob is a Giant, put a
+1/+1 counter on it, then destroy target creature
or planeswalker.