Gallow, End of the Line (Yellow)

Gallow’s second instant-activated ability requires its controller to tap Gallow and discard a card with watery grave for its activation cost. Discard a card to pay for a cost does not trigger the watery grave.

When Gallow’s second instant-activated ability resolves, you generate a continuous effect that until end of turn would prevent any effect controlled by your opponent that would trigger if an attack hits, including on-hit and on-damage effects. It does not prevent effects from triggering if the attack deals damage in other ways (in steps other than the damage step of combat), nor does it prevent effects that check if attacks previously hit (eg. wager).

If an effect would trigger, but is prevented by this, it still counts towards the number of times it would trigger. For effects that say “The next time” or “The first time” that are prevented from triggering, they won’t trigger again because their conditions were already satisfied.