Fossil Dragon Skullgios

Level 8 EARTH/Rock Fusion Effect
3500 ATK / 0 DEF

1 Rock monster + 1 Level 7 or higher monster in your opponent's GY
Must first be Special Summoned with "Fossil Fusion". Before damage calculation, if this card battles an opponent's monster: You can switch the current ATK and DEF of that opponent's monster until the end of that Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage. If this Fusion Summoned card battles an opponent's monster, any battle damage it inflicts to your opponent is doubled.

Rulings – Yugipedia

Printings:

Battles of Legend: Armageddon: BLAR-EN009 (Secret Rare) - 2020-07-23
Battles of Legend: Chapter 1: BLC1-EN132 (Common) - 2024-02-22

Prices:

Cardmarket: 0.09 €
TCGplayer: $ 0.14