结界
你每回合所施放的咒语不能多于一个。
每当你施放咒语时,抓一张牌。
If you cast Moderation, you've already cast at least one spell that turn (Moderation itself) so you won't be able to cast any more spells until the next turn. If Moderation comes under your control on a turn you haven't cast any spells, you'll be able to cast one spell that turn.