Alpha Weltall is a Gear that Lacan used 500 years ago that was aligned with the Anima Relic Naphtali , thus turning it into an Omnigear. This gear became Grahf's primary Gear, continuing to use it even after Lacan's physical body died, forcing him to seek out a new body. It was a powerful and menacing grey and black Gear that would appear at times out of nowhere and always brought trouble with it. The Gear sports a pair of large black wings that are often retracted, only extending to full span when the Gear is at full power. The player is presented with the opportunity to fight this Gear twice during the game, once at Mahanon and a second time at the Zohar Cave. Because of the staggering statistics it boasts at Mahanon Alpha Weltall is considered an unbeatable enemy. It is, however, beatable, and will drop a unique armor called the "Slayer's Robe" if a characer is equipped with the Trader Card upon Alpha Weltall's defeat. Compared with the Alpha Weltall fought at Mahanon, the version fought at the Zohar Cave is easier.
This Omnigear was formed approximately 500 years ago by the fusion of the Gear Lacan was piloting with the Anima Relic Naphtali.
As Deus' close defensive interface, the output of this Omnigear is incomparably greater than that of any normal Gear, to the extent that any within close range of its energy output are immediately incinerated. The living frame of this Gear is so strong that even the Goliath's 1200 sem cannon is not able to damage it.
Once Alpha Weltall has contacted the Zohar, it can draw on absolute power, causing it to transform in the same way as Xenogears. The famed bat-like wings that emerge from its back function as its primary defense system. When the masked man pilots it as Grahf, he recognizes and uses these abilities.