Substituting Ooze

Substituting Ooze enters the battlefield as a
copy of any creature on the battlefield, except it
has "Hybridize {1}{g}{u}." ({1}{g}{u}, Discard a
creature card: Put a +1/+1 counter on this creature.
If it isn't a Mutant, it becomes a Mutant in addition
to its other creature types.)
Laerez was never the same after the experiment.