When did this fellow evolve? Zhou Wen didn't see the metal parts. When he sensed Explosive Fiend Man's aura, he realized that it had already reached the Terror grade.
After unsummoning Explosive Fiend Man, he used his phone to look at his information.
Explosive Fiend Man: Terror (Evolvable)
Life Providence: Unlawful
Life Soul: Destroyer
Wheel of Destiny: Annihilation
Terror Form: Spacetime Fiend Man
Strength: 82
Speed: 82
Constitution: 82
Essence Energy: 82
Talent Skill: Death List, Time-Blast
Companion Form: Self-detonation Device
Zhou Wen carefully studied his stats. The power of the Wheel of Destiny augmented his explosive power, greatly enhancing his destructive forces.
As for the Terror transformation ability of Spacetime Fiend Man, it was probably tied to the metal parts.
