Red-Eyes Black Dragon Sword [DRL3-EN066] Ultra Rare Divine-Beast if "Golden Castle of Stromberg"

if "Golden Castle of Stromberg" is in the Field Zone: You can target 1 card on the field

Cannot attack

with a name different from the cards in your GY

then change the attack target to it

You can only Special Summon "Mekk-Knight Red Moon" once per turn this way

Red-Eyes Black Dragon Sword [DRL3-EN066] Ultra Rare Divine-Beast if "Golden Castle of Stromberg"Set: Dragons of Legend: Unleashed Card type: Fusion Effect Monster Rarity: Ultra Rare Attack: 2400 Defense: 2000 Must be Special Summoned with "The Claw of Hermos", using a Dragon Type monster, and cannot be Special Summoned by other ways. If this card is Special Summoned: Target 1 other face up monster on the field; equip this card to it. It gains 1000 ATK, and 500 ATK and DEF for each Dragon Type monster on the field and in the Graveyards.