When the Black Tide came, large numbers of polluted, alienated monsters would rise from the seabed, slaughtering and destroying everything in sight.
The Red Sea Trees in Eternal Night could absorb the Black Tide Pollution, but they were completely defenseless against the monsters.
So the Wizards' front line against the Black Tide was set outside the Red Sea Forest.
They had to kill the monsters before they got close, to prevent them from causing extensive damage to the Red Sea Trees and affecting their ability to absorb the Black Tide Pollution.
If Wizard Stewart stayed until the Black Tide came, he might have to join the fighting, too.
Among the Tier 3 Wizards in Eternal Night, Thor was probably the only one who hadn't been assigned to the battlefield.
When Stewart saw Thor, he immediately recalled his private conversation with His Majesty Ailuo a few days earlier.
Seeing Thor again now stirred many complicated emotions in him. But he had always kept his feelings to himself and showed nothing.
Thor, however, didn't rely entirely on his eyes to read people.
"Brother Thor," Penny carefully told him in her Diary, "his emotions are changing a lot while he looks at you!"
"Oh?" Thor immediately realized that Stewart might have learned something, or might be planning to do something to him. That would explain why his emotions seemed different from when they had discussed things together a few days ago.
Thor and Stewart hadn't interacted much. They had only discussed the Red Sea Trees together.
Had Stewart learned something that made his emotions fluctuate so much when facing Thor, enough for Penny to notice?
With so many people around, Thor put aside his desire to find out for now. Remembering the mark he had deliberately kept, he decided to sneak after Stewart