Tainted Pendant

Bloodsoak — When Tainted Amulet enters the battlefield, you may sacrifice a creature. If you
do, put a number of blood counters on Tainted
Amulet equal to that creature's power.
{3}{t}: Target player gains X life, where X is the
number of blood counters on Tainted Amulet.
{4}{t}: Target player loses X life, where X is the
number of blood counters on Tainted Amulet.