Although Chen Mo had left J.A.R.V.I.S., in his Transformers form, aboard the Dark Elf warship in Svartalfheim and had him pilot it back to Earth, that Transformer transformed from the Holographic Smartphone was merely one of J.A.R.V.I.S.'s many vessels.
Chen Mo could still use J.A.R.V.I.S. through his Iron Man suit or the watch that carried the Vibranium Nanotech Combat Suit.
Moreover, the Dark Elf warship had actually arrived at Earth long ago!
As the most advanced spacecraft of the Dark Elves, former rulers of the Nine Realms, the Cross Warship possessed the ability to perform Spatial Jumps. Although Svartalfheim was extremely far from Earth, the journey had not actually taken very long.
In fact, J.A.R.V.I.S. had already piloted the Dark Elf warship into Earth's outer space when the Avengers began clearing out the creatures from other worlds.
This was also one of Chen Mo's hidden trump cards!
If an overwhelmingly powerful enemy emerged from the Spatial Channel—such as the Fire Giant Surtur or Hela, the Goddess of Death—Chen Mo planned to have J.A.R.V.I.S. use the Dark Elf warship to launch a kinetic strike from space, accelerating downward from orbit while remaining cloaked!
With its own momentum and gravitational acceleration, the blade-shaped Dark Elf warship could reach terrifyingly high speeds. The destructive power unleashed upon impact would rival that of a Nuclear Bomb!
Furthermore, under the control of the super Artificial Intelligence J.A.R.V.I.S., the warship could rapidly adjust its descent trajectory even while plummeting at extreme speed. At such terrifying velocities, even Surtur and Hela would find it difficult to evade!
With the Dark Elf warship's durability and the enormous blades on its outer armor, it would be enough to slice any enemy in two and crush them into pulp!
However, while this trump card was immensely powerful, the consequences would