Pyroxene Fusion

Normal Trap

Send, from your hand or your side of the field to the Graveyard, the Fusion Material Monsters that are listed on a "Gem-Knight" Fusion Monster Card, then Special Summon that Fusion Monster from your Extra Deck. (This Special Summon is treated as a Fusion Summon.)

Rulings – Yugipedia

Printings:

Duel Terminal 6a: DT06-EN048 (Duel Terminal Normal Parallel Rare) - 2012-02-03
Hidden Arsenal 6: Omega Xyz: HA06-EN028 (Super Rare) - 2012-07-24

Prices:

Cardmarket: 0.46 €
TCGplayer: $ 0.39