Drought is a uncommon Enchantment card from Ice Age (ICE), collector number 21. Current market price: $0.32, TCGplayer market prices via Scryfall.
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.