Discordance of the Tistina (AGOV-EN092) [Age of Overlord]

Activate 1 of these effects;
<br>• If you control a "Tistina" monster: Banish 1 card from your opponent's GY, face-down.
<br>• If you control a "Tistina" monster Special Summoned from the Extra Deck: Banish all cards from your opponent's GY, face-down.
<br>You can banish this card from your GY, then target 1 "Tistina" monster in your GY; add it to your hand. You can only use 1 "Discordance of the Tistina" effect per turn, and only once that turn.