Svagra, Blood Witch

Eminence --- Whenever you put one or more -1/-1 counters on a creature, if Svagra, Blood Witch is
in the command zone or on the battlefield, create
a 0/1 Black Leech creature token.
Creature tokens you control get +1/+0 and have
Wither
{b}{r}{g}, Sacrifice X creatures, {t}: Draw X cards