It had always lurked beneath the surface of his skin, locked in a silent, yet violent battle against the cancer in Rui's body.
He hadn't wanted to use it within this forest, because he knew that this forest was disposable and was intended to be self-destructive with the purpose of destroying him.
On top of that, having sensed the unfathomable amount of antimatter there was within it, it was truly ill-advised to unleash the Gu upon such a volatile weapons and energy system, potentially destabilizing it and blowing himself up.
But if he was being blown up anyway, then there was one point in holding back.
Rui never used it lightly, for he had seen what even a single drop of it was capable of.
And yet, there were the right circumstances where he could use it.
One where he was confident that nobody he cared about would get afflicted.
And where only the people whom he wanted dead were subject to it.
RUMBLE!!!!!