Vendread Nightmare

Continuous Spell

Once per turn: You can Tribute 1 or more "Vendread" monsters from your hand and/or field, then target 1 face-up monster you control; increase its Level by the number of monsters Tributed, until the end of this turn. When your attacking "Vendread" Ritual Monster destroys an opponent's monster by battle: You can have your monster gain 1000 ATK. You can only use this effect of "Vendread Nightmare" once per turn.

Rulings – Yugipedia

Printings:

Flames of Destruction: FLOD-EN085 (Common) - 2018-05-03
2019 Gold Sarcophagus Tin Mega Pack: MP19-EN058 (Common) - 2019-08-29

Prices:

Cardmarket: 0.06 €
TCGplayer: $ 0.12