Tengu format ruling
Reign-Beaux, Overlord of Dark World
Card effect (current official text)If this card is discarded from your hand to your Graveyard by an opponent's card effect: Special Summon this card from the Graveyard. When this card is Special Summoned this way: Destroy all monsters your opponent controls OR all Spell/Trap Cards they control.
Rulings
- This card has two separate effects. They form two separate Chains.
- For the second effect of this card, you cannot choose a type of card that your opponent does not control. If your opponent has no monsters and no Spell or Trap Cards, the effect still activates, but disappears at resolution.
- You decide whether to destroy all your opponent’s monsters, or all your opponent’s Spell and Trap Cards, when the effect resolves.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.