Goat format ruling
Curse of Royal

Card effect (current official text)Negate the activation and the effect of a Spell or Trap Card that includes the effect of destroying 1 Spell or Trap Card and destroy it.
Rulings
- You can only activate Curse of Royal as a chain to a Spell/Trap Card that would destroy 1 (and ONLY 1) Spell/Trap Card.
- You cannot use Curse of Royal against Heavy Storm or Harpie’s Feather Duster.
- You can activate Curse of Royal as a chain to a Spell/Trap Card that would destroy 1 (and ONLY 1) Spell/Trap Card.
- You cannot use Curse of Royal against Heavy Storm or Harpie's Feather Duster.
- Curse of Royal can only be used against S/T Cards.
- Q: Player A attacks with a 4 star monster. Player B flips "Gravity Bind" Player A activates a set "Raigeki Break," discards a card, and declares "Gravity Bind" as the target. Player B chains with "Curse of Royal" because "Raigeki Break" designated a Spell/Trap as the card to be destroyed. Can this be done? Is "Raigeki Break" a valid card for "Curse of Royal's" criteria? Nowhere does the text on "Raigeki Break"state it should specifically destroy 1 S/T, but it's very possible that the end result would be 1 S/T destroyed. A: If "Raigeki Break" targets a Spell/Trap card then "Curse of Royal" may be activated in response to negate its activation and destroy it. "Raigeki Break" does target one specific card. Since that card was a Trap Card, "Curse of Royal" was able to stop it.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.