The Oilers signed Dermott to one year, two-way contract at league minimum salary, which is great value for a quality depth defender. On a two-way deal, he can move between the AHL and NHL without waivers, which is a major asset.
The Oilers will likely continue to make paper transactions like this throughout the season to maximize their available salary cap. It will be a long and confusing process, but done correctly, and the Oilers will give themselves a major advantage of more cap space to spend at the trade deadline.
With the signing of Dermott and placing Kane on the LTIR, the Oilers will have their roster fully set for the beginning of the regular season. The puck drops in Edmonton for the first time this season tomorrow night against the Winnipeg Jets.