Darkfire Dragon + Cyber Commander → Metal Dragon

Darkfire Dragon + Jinzo #7 → Metal Dragon

Darkfire Dragon + Dice Armadillo → Metal Dragon

Darkfire Dragon + Thunder Dragon → Twin-headed Thunder Dragon

Darkfire Dragon + Water Magician → Spike Seadra

Darkfire Dragon + Ice Water → Spike Seadra

Darkfire Dragon + Waterdragon Fairy → Spike Seadra

Darkfire Dragon + Beautiful Beast Trainer → Flame Swordsman

Darkfire Dragon + Water Girl → Spike Seadra

Darkfire Dragon + Metal Fish → Metal Dragon

Darkfire Dragon + Mech Bass → Metal Dragon

Darkfire Dragon + Turu-Purun → Spike Seadra