Medusa, Bane of Polidektes

Flash, Ward {4}
Petrify - Whenever this creature deals combat damage
to a nonhero creature, put a Paralyse counter on that
creature. A creature with a Paralyse counter on it has
Defender. Remove all damage dealt by that creature to Medusa, Bane of Polidektes.

Whenever Medusa, Bane of Polidektes leaves the battlefield, remove all Paralyse counters from each creature, that has this counter on it.