25: How do they see themselves 5 years from today?
Kayn is convinced he will vanquish the darkin and master his power, achieving his ascended form as the Shadow Assassin and the new Master of Shadows.
Before this, he believes Zed will acknowledge his talent and skill, and accept he has been surpassed. Ideally, Kayn is ready to fight Zed to prove himself, and perhaps Zed might even guide him through techniques to subdue the darkin with Shadow. If you look at Kayn’s Shadow Assassin transformation, he seemingly drowns Rhaast’s eye in shadow until it’s consumed and the red stain disappears completely.
Once he achieves this, he becomes the rightful master of the Order. Hopefully, without killing Zed. Kayn genuinely doesn’t want to, yet. But we all know Zed will not accept someone has surpassed him. Ironically, he will probably find himself mirroring his master Kusho.