Sila, The Many-Faced Moon

Whenever a creature enters
the battlefield, you may have Sila become a copy
of that creature until the end of your next turn.
Whenever a creature type enters the battlefield that
wasn't there before this game, put a +1/+1 counter
on Sila, these counters apply to the power and
toughness of any creature copy Sila transforms into.

Whenever a player casts a creature spell,
draw a card.