Red Reign

Normal Trap

If you control a Level 8 or higher Synchro Monster: Banish all monsters on the field, except the monster(s) with the highest Level, also the remaining face-up monsters on the field are unaffected by other card effects, except their own, until the end of this turn. If a DARK Dragon Synchro Monster is Synchro Summoned to your field while this card is in your GY: You can add this card to your hand. You can only use this effect of "Red Reign" once per turn.

Rulings – Yugipedia

Printings:

Eternity Code: ETCO-EN074 (Super Rare) - 2020-04-30
2021 Tin of Ancient Battles: MP21-EN084 (Common) - 2021-09-30
Structure Deck: The Crimson King: SDCK-EN035 (Common) - 2023-09-21

Prices:

Cardmarket: 0.12 €
TCGplayer: $ 0.06