Simic Leviathan

Flying, trample
Evolve (Whenever a creature enters the battlefield
under your control, if that creature has greater power
or toughness than this creature, put a +1/+1 counter
on this creature.)
Whenever a +1/+1 counter is put on Simic Leviathan, scry X, where X is equal to the
number of +1/+1 counters on it.