__________________
"You were weak when I found you. I did not expect you to survive your training. But now, your hatred has become your strength. At last, the dark side is your ally. "
Put in his shenanigans in KOTET Chapter 8/9, though. Namely him consuming Vaylin’s spirit, stopping Arcann/Senya with his time/perception shenanigans while dominating the Outlander, and overwhelming the spirits of Outlander/Vaylin/Arcann while the Outlander was using Valkorion’s holocron to further stack the odds in their favor.
__________________ ”You presume limits to my power. There are none.”