The Wanderer

: The Wanderer enters the battlefield with X +1/+1 counters on it. The Wanderer is a 0/0 creature. It's still a planeswalker.
+1: The Wanderer gains menace and trample until end of turn.
-2: Until end of turn, The Wanderer gets +2/+2 and can't be blocked except by three or more creatures.