Merlin

Level 3 DARK/Spellcaster Effect Monster
1400 ATK / 500 DEF

You can only use each effect of "Merlin" once per turn.
● You can Tribute this card; Special Summon 1 "Noble Knight" monster from your Deck. You cannot Special Summon monsters the turn you activate this effect, except "Noble Knight" monsters.
● (Quick Effect): You can banish this card from your GY; immediately after this effect resolves, Synchro Summon 1 "Noble Knight" Synchro Monster using monsters you control.
● (Quick Effect): You can banish this card from your GY; immediately after this effect resolves, Xyz Summon 1 "Noble Knight" Xyz Monster using monsters you control.

Rulings – Yugipedia

Printings:

Noble Knights of the Round Table Box Set: NKRT-EN001 (Platinum Rare) - 2014-11-20
Battles of Legend: Relentless Revenge: BLRR-EN073 (Secret Rare) - 2018-06-28

Prices:

Cardmarket: 0.63 €
TCGplayer: $ 0.74