Thestalos the Mega Monarch [GFTP-EN082] Ultra Rare SWSH078 This damage begins at 200

This damage begins at 200 and is doubled during each of your following Standby Phases

you can either: Target 1 face-up Xyz Monster you control

Set: Black & White: Black Star Promos Type: Stadium Rarity: Black Star Promo

Set: Hidden Summoners Card type: Effect Monster Rarity: Super Rare Attack: 600 Defense: 600 You can Tribute this card and 1 other monster: Special Summon 1 "Sacred Phoenix of Nephthys" from your hand or Deck

Set: Secrets of Eternity Card type: Xyz/Effect Monster Rarity: Ultimate Rare Attack: 2700 Defense: 2000 3 or more Level 5 LIGHT monsters During your Main Phase 2

Thestalos the Mega Monarch [GFTP-EN082] Ultra Rare SWSH078 This damage begins at 200Set: Ghosts from the Past Card type: Effect Monster Rarity: Ultra Rare Attack: 2800 Defense: 1000 You can Tribute Summon this card by Tributing 1 Tribute Summoned monster. If this card is Tribute Summoned: Look at your opponent's hand and discard 1 card from their hand, then, if it was a Monster Card, inflict damage to your opponent equal to its original Level x 200. If this card was Tribute Summoned by Tributing a FIRE monster, add this additional