Mobile War God, Armor King Tengai-Oh (Xi Gundam / Heavenly Zeorymer)

Located in the tumultuous land of Gaunland, a mysterious statue stands, which is none other than a legendary Mobile War God left by celestial warriors. When its seal was broken, Tengai-Oh bestowed legendary divine instruments upon the Combatant Quintet and granted new powers to Steel Maru. It joined the quintet in battle to thwart the ambitions of the Demon Star, which aimed to connect the demon realm with the celestial palace. However, to maintain the seal between the realms, Tengai-Oh used its body to close the portal to the demon realm and was heavily damaged during an intense attack by the Demon Star forces, resulting in its body being taken over. After the final battle, freed from the curse of the Demon Star, Tengai-Oh sealed the portal once more and chose to reseal itself in stone, continuing its vigil over the peace of the celestial palace.

Tengai-Oh possesses three forms: the Giant Face God Face Mode, the SD Type Magic Seal Form, and its original Real Type. It later appears in "Musha ○ Den" where it is controlled by Demon Blade Gundamu and destroyed by Kotomaru (Bakuou Gundamu).

The design primarily takes after Xi Gundam, but elements from the non-Gundam series "Project Zeorymer of the Heavens" are also parodically incorporated into its design, as both Xi Gundam and Heavenly Zeorymer were designed by Yasuhiro Moriki.

Weapons:
Thunder Strike Sword
Earth Treasure Wheel
Radiant Path Armor Cannon

BB Warrior No.147 is equipped with five divine instruments which can be fitted to the Combatant Quintet.