Witchmon

Effect

[On Play] [When Digivolving] By trashing 1 card in your hand, until the end of your opponent's turn, 1 of your opponent's Digimon gains "[End of Attack] Delete this Digimon."

Source Effect

[Opponent's Turn] [Once Per Turn] When an opponent's Digimon attacks, by deleting 1 of your other Digimon, end the attack.