Oblex

Oblex enters the battlefield as a copy of any creature
on the battlefield or any player's graveyard with a
cost of X or lower, except it's an ooze shapeshifter in addition to it's other types.

{x}{u}{g}: Create a 0/0 blue green ooze shapeshifter
token with "This creature enters the battlefield as a
copy of any creature on the battlefield or any player's graveyard with a cost of X or lower, except it's an
ooze shapeshifter in addition to it's other types."