Ernest, Pale-Knight Heir

+1: If you have an experience counter, create a 1/1 white Vampire Knight creature token with lifelink.
0: Until your next turn, target creature an opponent controls can't attack. If you don't have an experience counter, you get an experience counter.
-4: For each experience counter you have, exile up to one target creature or planeswalker an opponent controls with converted mana cost 4 or less.