You can only activate a card with this card’s name once per turn.
(1): When this card resolves: Send 1 monster you control to the GY. If “Golden Castle of Stromberg” is in the Field Zone, you can send 1 monster your opponent controls to the GY instead.
(2): During your Standby Phase: You can target 1 monster in either GY that was sent there by this card’s (1) effect; destroy this card, and if you do, Special Summon that target to your field.