Bandersnatch

Bandersnatch enters the battlefield with 3 ferocity counters on it. Whenever another creature enters
the battlefield under your control, remove a
ferocity counter from Bandersnatch.
Bandersnatch gets -1/-1 and deathtouch as long
as it has a ferocity counter on it.
Bandersnatch gets +1/+1 and lifelink as long as it
does not have a ferocity counter on it.