Oneiros, the Dream Mirror Tormentor

Level 10 DARK/Fiend Fusion Effect
3000 ATK / 3000 DEF

2 "Dream Mirror" monsters with different Attributes
While face-up on the field, this card is also LIGHT-Attribute. You can only use each of the following effects of "Oneiros, the Dream Mirror Tormentor" once per turn.
● When a monster effect is activated while "Dream Mirror of Terror" is in a Field Zone (Quick Effect): You can negate that effect.
● If "Dream Mirror of Joy" is in a Field Zone (Quick Effect): You can Tribute this card; Special Summon 1 "Oneiros, the Dream Mirror Erlking" from your Extra Deck in Defense Position.

Rulings – Yugipedia

Printings:

Blazing Vortex: BLVO-EN042 (Super Rare) - 2021-02-04

Prices:

Cardmarket: 0.27 €
TCGplayer: $ 0.17