Unholy Magic

When you play unholy magic, note A, B or C
and place the note under this card. If a creature
dies, reveal the note and the noted effect occurs
until end of turn. Then sacrifice unholy magic.
A. Whenever a creature dies, return the creature
to play and gain control of it. The creature gains
shadow and decayed.
B. Whenever a creature dies, its owner loses 1 life.
C. Whenever a creature dies, it deals 1 damage to
each other creature.