Roose Bolton, Leech Lord

Whenever Roose Bolton, Leech Lord enters the
battlefield, create four artifact tokens named
"Leech".
Any time an opponent player plays an instant or sorcery card, put a -1/-1 counter on target nonlegendary creature.
{1}{b}{b}{t}: destroy target creature with a -1/-1
counter on it.
{1}{b}, sacrifice an artifact token named "Leech": Prevent any damage dealt to this creature.