Oh, it's come quite a ways.
It started out as a oneshot novel; I wanted to just write one interesting fantasy story that had no sequels or prequels and ended there.
Mortimer was a quite young half-elf, had some really bad edgy dialogue, and rather than being corrupted by black magic, he had a pact with an extradimensional demonic creature called the Jinxer. The whole series would escalate from Mortimer trying to take small jobs to having to stop the creature without breaching the contract.
Veriesin was actually Ceejay, who was called Frieda in that version. She was the human character instead, and had missing teeth entirely instead of a single quartz tooth (she was still cursed to transform into animals). I only got a chapter in until I gave up, but I still drew the characters for years until I finally decided to tackle the story again.
I unfortunately threw away the artwork over time, but I know Mortimer was actually dressed in gray and had white hair, and the Amberhobs were more rabbit-like and walked on all fours. Not only that, the trio that follows Mortimer were once a single character named Claws, but over time split into three with several working names like Ringbite and Swift - I also had some really yikes-level approach to the character species, which are best left to the imagination, because I was a dumb 16 year old. Louize was always in, but as a balloon-like dragon that couldn't speak.
Funnily enough, though I trashed and changed around most of the start of that version, the ending is mostly unchanged from the Chapter 1 scene we're having right now, exluding of course making the dialogue a little more professional.