Derek and Alby decided to follow Seven and his friends up after their discovery... Although they didn't know their exact location, the fact that there was only one way out of the camp made it clear. Plus, they noticed other people escaping through that path, crowded... There was no way Seven and his friends couldn't have gone that way.
In a rush, they sprinted towards that route, scampering into the crowd... No one had noticed that they were actually the ones who had caused the fire, so there wasn't any reaction of panic as they squeezed by.
Derek's eyes were painted dark red as he couldn't put down the realization of the unbelievable escape of Seven and his friends...
Before they left Sagemount, they had used Lan's soul to power up their powers, which resulted in the terrifying Darklight Spell... It was crazy why they had to use their friends, but what could they do?