Drought 干旱
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.
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.
在你的维持开始时，除非你支付{W}{W}，否则牺牲此结界。
咒语的法术力费用中每有一个黑色法术力符号，便须额外支付「牺牲一个沼泽」来施放。
起动式异能的起动费用中每有一个黑色法术力符号，便须额外支付「牺牲一个沼泽」来起动。
Paratranz单卡释疑
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(2004-10-04 gpt)
你必须为起动费用中每一点黑色法术力牺牲一个沼泽。如果你用瘟疫起动{黑}{黑}{黑}{黑}，则这会是4次{黑}的起动，所以你要牺牲4个沼泽。
You have to sacrifice a Swamp for each black mana in the activation cost. If you use Pestilence with {B}{B}{B}{B}, that’s 4 activations with {B} each so you sacrifice 4 Swamps. -
(2008-08-01 gpt)
一个同时具有黑色和其他类别的混血符号，都是黑色法术力符号，与支付何种费用无关。
A hybrid symbol that is both black and another type is a black mana symbol, regardless of what cost is paid for it. -
(2016-06-08 official)
起动式异能会包含冒号。通常会写成「[费用]：[效应]。」有些关键字也属于起动式异能；它们的规则提示中会包含冒号。
Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.