Lilting Refrain
Enchantment
At the beginning of your upkeep, you may put a verse counter on this enchantment.
Sacrifice this enchantment: Counter target spell unless its controller pays 
, where X is the number of verse counters on this enchantment.
Berry
Urza's Saga (USG)
• #83Rulings
Adding a counter is optional. If you forget to add one during your upkeep, you cannot back up and add one later.
(wotc • 2004-10-04)
Rulings
Adding a counter is optional. If you forget to add one during your upkeep, you cannot back up and add one later.
(wotc • 2004-10-04)