跨濤師

Text:

每當跨濤師成為橫置時，你可以支付。 若你如此作，則將目標永久物移回其擁有者手上。

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.