結界
你每回合所施放的咒語不能多於一個。
每當你施放咒語時,抽一張牌。
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.