You found me, but I am already "UNDEAD". Fallen to the Abyss, corrupted beyond repair. I am death.
Afterjam edit. This game and profile was part of ARG entry: Papers & Dragons Solution for clue about AlterKnight leaving clues for "OTHER CHAMPIONS" is not available anymore! Answer for that part was to look previous winners of GM48, and AlterKnight have had left feedback on those games, which combined would have said "open my profile picture separately to see". As they were only clutter feedbacks, I removed them after GM48 37th had ended.
Solution can also be found in walkthrough video (timestamp 6:55) :