Vile Trove

At the beginning of your upkeep, lose 1 life and create a tapped 2/2 Black Zombie creature token.
Sacrifice a Zombie: Each player loses 1 life, then add {b} to your mana pool.
{b}, Sacrifice a Zombie: Each player loses 1 life, then put two -1/-1 counters on target creature.
To a normal person, a horrific sight.
To Xarlid, a rare delight.