Future Fusion

Continuous Spell

During your 1st Standby Phase after this card's activation: Show 1 Fusion Monster in your Extra Deck and send the Fusion Materials listed on it from your Main Deck to the GY. During your 2nd Standby Phase after this card's activation: Fusion Summon 1 Fusion Monster from your Extra Deck with the same name as the monster you showed, and target it with this card. When this card leaves the field, destroy that target. When that target is destroyed, destroy this card.

Rulings – Yugipedia

Printings:

Power of the Duelist: POTD-EN044 (Rare) - 2006-08-16
Power of the Duelist: POTD-EN044 (Ultimate Rare) - 2006-08-16
Duelist Pack: Zane Truesdale: DP04-EN023 (Common) - 2007-03-07
Gold Series 2009: GLD2-EN039 (Gold Rare) - 2009-04-21
Legendary Collection 2: The Duel Academy Years Mega Pack: LCGX-EN186 (Ultra Rare) - 2011-10-04
Duel Terminal 6a: DT06-EN041 (Duel Terminal Normal Parallel Rare) - 2012-02-03
Ra Yellow Mega Pack: RYMP-EN064 (Ultra Rare) - 2012-02-17
Duelist Saga: DUSA-EN062 (Ultra Rare) - 2017-03-30
Legendary Dragon Decks: LEDD-ENB17 (Common) - 2017-10-05
Structure Deck: Cyber Strike: SDCS-EN029 (Common) - 2021-10-14
Speed Duel GX: Duel Academy Box: SGX1-ENG13 (Common) - 2022-03-17
Quarter Century Bonanza: RA03-EN168 (Platinum Secret Rare) - 2024-11-07
Quarter Century Bonanza: RA03-EN168 (Quarter Century Secret Rare) - 2024-11-07

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.19