高潮測り

Text:

高潮測りがタップ状態になるたび、パーマネント１つを対象とする。あなたはを支払ってもよい。 そうした場合、それをオーナーの手札に戻す。

Rulings:

• 10/1/2007 This is a triggered ability, not an activated ability. It doesn’t allow you to tap the creature whenever you want; rather, you need some other way of tapping it, such as by attacking with the creature.
• 10/1/2007 For the ability to trigger, the creature has to actually change from untapped to tapped. If an effect attempts to tap the creature, but it was already tapped at the time, this ability won’t trigger.