At the beginning of your upkeep, you may put a verse counter on Vile Requiem.
, Sacrifice Vile Requiem: Destroy up to X target nonblack creatures, where X is the number of verse counters on Vile Requiem. They can't be regenerated.
10/4/2004 Adding a counter is optional. If you forget to add one during your upkeep, you cannot back up and add one later.