전설적 생물 — 인어 마법사
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당신의 상대들이 당신이 조종하는 인어를 목표로 발동하는 주문은 발동하는 데

가 더 든다.
당신의 상대들이 당신이 조종하는 인어를 목표로 활성화하는 능력은 활성화하는 데

가 더 든다.
Activated abilities contain a colon. They're generally written "[Cost]: [Effect]."
Spells and abilities that target more than one Merfolk you control cost only
more to cast or activate.
To determine the total cost of an opponent's spell that targets a Merfolk you control, start with the mana cost or alternative cost that player is paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
Kopala's abilities won't affect triggered abilities (starting with "when," "whenever," or "at") that target a Merfolk you control.