Vampire Hexmage

Oracle Text

First strike

Sacrifice Vampire Hexmage: Remove all counters from target permanent.

Card Rulings

10/1/2009 Any permanent can be targeted by the second ability, not just one with counters on it.
10/1/2009 If all loyalty counters are removed from a planeswalker, that planeswalker is put into its owner’s graveyard as a state-based action.