Denvel's Final Assault

The Dark Mist Legion realized that the other Void Sigils were being dispelled, so they launched an all-out assault on the location of the final sigil: Asterleeds.
If Denvel completes the final mark sigil this time, all the sigils will amplify each other, eventually causing the entire plains to be swallowed by the Void Mist.
Therefore, it is imperative to use the massive Engram Collector found in the Forbidden Land of Kanamia to dispel the Void Sigil before he succeeds.