User blog comment:Hulk10/Avak's Prison Power/@comment-183721-20200409192555

My impression is that he needs to know the target's powers in order to effectively imprison them. I remember in one of the books Avak tried to imprison Kongu in a vacuum, but didn't realize the Toa wore a Mask of Telepathy, which he was able to use to make Avak lose concentration.