Chimeratech Megafleet Dragon

Level 10 DARK/Machine Fusion Effect
0 ATK / 0 DEF

1 "Cyber Dragon" monster + 1+ monsters in the Extra Monster Zone
Cannot be used as Fusion Material. Must first be Special Summoned (from your Extra Deck) by sending the above cards from either field to the GY. (You do not use "Polymerization".) The original ATK of this card becomes 1200 x the number of Fusion Materials used for its Special Summon.

Rulings – Yugipedia

Printings:

Legendary Dragon Decks: LEDD-ENB00 (Ultra Rare) - 2017-10-05
Battles of Legend: Armageddon: BLAR-EN085 (Secret Rare) - 2020-07-23
Ghosts From the Past: The 2nd Haunting: GFP2-EN126 (Ultra Rare) - 2022-05-05

Prices:

Cardmarket: 0.36 €
TCGplayer: $ 0.17