Gelatinous Cube

Conjure {2}(If 2 or more +1/+1 counters have been
put on 1 or more creatures or a player has gained 2 or
more life this turn, this spell costs {2} less to cast.)
Exile target creature card in any graveyard with a toughness X. Create an X/X green Ooze token
with Lifelink and "Sacrifice this permanent at
end of turn."