潮縛りの魔道士

潮縛りの魔道士が戦場に出たとき、対戦相手がコントロールしていて赤か緑であるクリーチャー１体を対象とし、それをタップする。あなたが潮縛りの魔道士をコントロールし続けているかぎり、そのクリーチャーはそれのコントローラーのアンタップ・ステップにアンタップしない。

Tidebinder Mage

When this creature enters, tap target red or green creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control this creature.

Pioneer Masters

Duel Decks: Merfolk vs. Goblins

When Tidebinder Mage enters the battlefield, tap target red or green creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Tidebinder Mage.

Magic 2014

If another player gains control of Tidebinder Mage, the creature will no longer be affected by the ability preventing it from untapping, even if you later regain control of Tidebinder Mage.

If you gain control of the creature that’s being prevented from untapping, that creature won’t untap during your untap step for as long as you control Tidebinder Mage.

If you lose control of Tidebinder Mage between when it entered the battlefield and when the ability resolves, the target creature will become tapped. However, it won’t be affected by the other effect and will untap as normal during its controller’s untap step.

The ability can target a tapped creature. If the targeted creature is already tapped when it resolves, that creature just remains tapped and doesn’t untap during its controller’s next untap step.