|Rumble Blend Number (1-10)||[N 1]||ランブルブレンドナンバー(1～10)||Ranburu Burendo Nanbā (1-10)||Uses attacks that it has copied from other Digimon.|
|[N 2]||A special attack which is made Sephirothmon's analyzation for enemy.|
- Any Perfect Digimon with the Beast Spirit of Steel
Mercuremon evolves into Sephirothmon using the Beast Spirit of Steel and sucks the Legendary Chosen into him and have his minions battle them so he can copy all of their attacks. When he accomplishes this he battles them and comes near winning but when they learn that if they combine their attacks his ability to negate them doesn't work he is beaten and scanned.
He hosts these ten steel spheres within him:
- Area of Darkness
- Area of Earth
- Area of Fire
- Area of Ice
- Area of Light
- Area of Steel
- Area of Thunder
- Area of Water
- Area of Wind
- Area of Wood
A Sephirothmon was an attraction at Digimon Land, but it was revealed that he was the park's real owner.
Sephirothmon is only obtainable as a collectible card. Its card is part of the Five Warriors of Evil Beast (悪の五闘士ビースト, Aku no Gotoushi Bīsuto) set.