Corwinnn, Knight Exemplar

+1: Put a +1/+1 counter on target permanent.
-1: Until end of turn, whenever a nontoken creature with power 2 or less enters the battlefield under your control, draw a card.
-3: Until your next turn, Corwinnn becomes a 2/2 Squirrel Knight creature and gains protection from everything. He is still a planeswalker.