I mean to gain a familIar maybe you have to win it over In some way. Like Fex’s Bull seems to genuinely like him and may have even chose him. So maybe with Quinns actions the Boneclaw appreciated something in Quinn and chose to be his familiar.
I'm a bit confused about the quest failed notification, and then a new optional quest popping up, I'm guessing author will elaborate next chapter.
The boneclaw looks crazy powerful though, it could be a substantial power boost to Quinn.
Would have wanted him to defeat the boneclaw because his evolution has been pushed back a lot. Anyway I can't wait for the next chapter. It'd be explained there. Thanks for the chapter. 👍🏽