System mastermind behind all this

Xiao Hui's voice didn't exactly send shockwaves through the other true gods. They weren't exactly system experts. Sure, they knew the system was a higher-level god, on par with the World's Heart, but no one had ever gotten as far as Alex. 

Basically, the gods had heard whispers about the system but never actually met the guy.

Meanwhile, the true god brawl raged on. The five gods threw around so much power that even god-level Xiao Hui and Arthas had to backpedal.

Xiao Hui glanced anxiously towards Aether Isle. She could feel the strange energy there dwindling, meaning Alex's breakthrough was progressing, and the island was slowly descending. 

From the edge of the Endless Sea, six continents were visible, but Nytheria was conspicuously absent. Xiao Hui suspected this had something to do with the core of will.

Arthas tried to contact Death Spirit, but he was ghosting them, nowhere to be found.