Phyrexian Soulgorger

Oracle Text

Cumulative upkeep—Sacrifice a creature. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Card Rulings

7/15/2006 When Phyrexian Soulgorger’s cumulative upkeep ability resolves, you must either sacrifice a different creature for each age counter on Phyrexian Soulgorger or sacrifice it. You may also sacrifice it as part of its own upkeep payment.