De-Fusion

Quick-Play Spell

Target 1 Fusion Monster on the field; return that target to the Extra Deck, then, if all the Fusion Materials that were used for its Fusion Summon are in your GY, you can Special Summon all of them.

Rulings – Yugipedia

Printings:

Labyrinth of Nightmare: LON-097 (Super Rare) - 2003-03-01
Labyrinth of Nightmare: LON-E097 (Super Rare) - 2003-03-01
Labyrinth of Nightmare: LON-EN097 (Super Rare) - 2003-03-01
Dark Beginning 2: DB2-EN029 (Common) - 2005-07-27
Duelist Pack: Zane Truesdale: DP04-EN017 (Common) - 2007-03-07
Duel Terminal 4: DT04-EN094 (Duel Terminal Normal Parallel Rare) - 2011-01-25
Legendary Collection 3: Yugi's World Mega Pack: LCYW-EN063 (Common) - 2012-09-29
Yugi's Legendary Decks: YGLD-ENB31 (Common) - 2015-11-12
Structure Deck: Yugi Muto: SDMY-EN032 (Common) - 2016-10-20
Legendary Collection Kaiba Mega Pack: LCKC-EN044 (Secret Rare) - 2018-03-08
Speed Duel: Battle City Box: SBCB-EN012 (Common) - 2020-11-26
Speed Duel Tournament Pack 4: STP4-EN011 (Super Rare) - 2022-09-29

Prices:

Cardmarket: 0.11 €
TCGplayer: $ 0.22