Card Appearances:Dragonecro Nethersoul Dragon
- In chapter 3, the Skeleton Knight used "Ghost Fusion" fusing the "Hellfire Sleeping Beauty, Ghost Sleeper" on his side of the field and a "Hellfire Dragon, Ghost Wyvern" from his Deck to Fusion Summon "Underworld Dragon Dragonecro". He used "Dragonecro" to attack Yusei's "Mighty Warrior" and steal its soul, forming "Mighty Warrior Dark Soul". At the end of the chapter, the knight ordered "Dragonecro" to attack "Lightning Warrior".
- In chapter 4, Yusei protected "Lightning Warrior" with "Junk Shield" and later switched "Dragonecro" to Defense Position with "Synchro Gazer".
