| Set | Date | Rarity | Treatment |
|---|---|---|---|
| ICE #21 | 1995-06-03 | Uncommon | Standard |
At the beginning of your upkeep, sacrifice this enchantment unless you pay {W}{W}.
Spells cost an additional "Sacrifice a Swamp" to cast for each black mana symbol in their mana costs.
Activated abilities cost an additional "Sacrifice a Swamp" to activate for each black mana symbol in their activation costs.