Curse of Dragon + Electric Snake → Twin-headed Thunder Dragon

Curse of Dragon + Mega Thunderball → Twin-headed Thunder Dragon

Curse of Dragon + Electric Lizard → Twin-headed Thunder Dragon

Oscillo Hero #2 + Thousand Dragon → Twin-headed Thunder Dragon

Oscillo Hero #2 + Kairyu-shin → Twin-headed Thunder Dragon

Oscillo Hero #2 + Crawling Dragon #2 → Twin-headed Thunder Dragon

Oscillo Hero #2 + Red-eyes B. Dragon → Twin-headed Thunder Dragon

Oscillo Hero #2 + Crawling Dragon → Twin-headed Thunder Dragon

Oscillo Hero #2 + Dragon Zombie → Twin-headed Thunder Dragon

Oscillo Hero #2 + Yamadron → Twin-headed Thunder Dragon

Oscillo Hero #2 + Seiyaryu → Twin-headed Thunder Dragon

Oscillo Hero #2 + Parrot Dragon → Twin-headed Thunder Dragon