Slumbering Dragon

Slumbering Dragon

Creature - Dragon | Power/Toughness: 3 / 3 (CMC 1)
Flying
Slumbering Dragon can't attack or block unless it has five or more +1/+1 counters on it.
Whenever a creature attacks you or a planeswalker you control, put a +1/+1 counter on Slumbering Dragon.