JKSManga
Honestly I think he would be proud of quinn actually it’s not really that he hated the shadow powers in the past he hated what they were being used for which is why he killed kroll but if he had wanted to he could have hid that shadow crystal so that it wouldn’t ever be found before he went into the tablet
Quinn's shadow army is op he can send them to infect others then later teleport and collect them storing them into his shadow space to bring out whenever. I really want Quinn tricking Jim like luring out most of humanity/vampires forces to some far away planet, but Quinn shadow infects a small animal and leaves it right outside Jim's doorstep then teleports to it releasing his shadow army.
Well I suppose having 3 Demon tier beast at you beck and call can't be all that bad, and if Jim dies try to go after Quinn or his family, at least Quinn will have a army to stand against him. I'm not sure how Quinn will explain the situation to Edvard, but then again I would imagine he'll tell him the truth, just so Edvard doesn't look into it more.