Gellenduo

Level 4 LIGHT/Fairy Effect Monster
1700 ATK / 0 DEF

Cannot be destroyed by battle. If you take any damage: Destroy this face-up card. This card can be treated as 2 Tributes for the Tribute Summon of a LIGHT Fairy monster.

Rulings – Yugipedia

Printings:

Strike of Neos: STON-EN067 (Secret Rare) - 2007-02-28
Dark Legends: DLG1-EN112 (Ultra Rare) - 2008-11-21
Duel Terminal 5a: DT05-EN012 (Duel Terminal Normal Parallel Rare) - 2011-05-29
Structure Deck: Wave of Light: SR05-EN016 (Common) - 2018-01-18

Prices:

Cardmarket: 0.17 €
TCGplayer: $ 0.39