Ironically, although Evan had been the one who wanted the Chasm to close more than anyone else, he wasn't even there when it finally happened.
At the time, he had been occupied intercepting a platoon of Infernal Devil scouts who were attempting to gather intelligence on how many of Tír Síorghlas' forces were moving from the west to rendezvous with the spirits of Nature's Dwelling in the south-eastern part of the continent.
The goal of this manoeuvre was to unify both armies and begin a joint march toward Trifid.
Evan had detected the scouts while they were en route to the Chasm and promptly excused himself, stating that he was going to "deal with the rats."
It wasn't until after the Chasm wall had already dissipated and the leaders of both armies had crossed over that Evan, who had taken on his dragon form due to the need for sheer destructive power to dealwith the rats, finally arrived.