Bright commits crimes against reality.
Ice is an a$$hole. Like, he will be sarcastic, he will roast you, he will take a rude tone to the O5 Council, he's just not nice to people at first.
However, if you can tolerate him for more than maybe six months, he'll start to warm up to you. Maybe. This does not apply if you don't at least try to be nice to him, and the nicer you are to him, the nicer he'll be to you.
People don't often manage this, but somehow, Bright did. Bright, notorious at the time for being completely unlikable. Gears did somewhat, but was also highly abus1ve.
Somehow, the two most unanimously disliked people in the Foundation ended up getting quite close. Bright was even one of the few people who knew Ice's real name (Personally, I like Julian Sylvester-Finn, got both bio father and step-father's last names)
And then, Ice d1es. Bright is the one to find his b0dy. Out of everyone in the small group of people who could even somewhat tolerate each other, Bright takes this the hardest. This is around the time of the creation of the first chainsaw cannon.
Also around this time, Bright goes to his mother, Evelyn Bright. She works with Prometheus Labs. She basically says, 'Well, if you don't want him d3ad, you could just bring him back to life!'
Bright is horrified by this prospect, his own worst experiences being connected to getting brought back to life through 963, but slowly, the idea starts to grow on him. He wouldn't have to make the resurrection permanent, after all. Just reanimate the b0dy, put the mind and soul back in, a few stitches here and there, Ice didn't have blood thanks to his temperature so that wouldn't be a problem...
Then, Kondraki d1es. This is the first major leap towards choosing necromancy that Bright takes. And finally, at least a decade later, Claire Lumineaux d1es. This is what finally pushes Bright over the edge.
First, he has Nobody hack into the alarms and turn them off. Then, breaks into SCP-049's containment cell and breaks the Doctor out. After that, he grabs SCP-073 and briefs him on the plan, leaving some details out. Cain thinks this is a horrible idea, but goes along with it because he doesn't want Bright to get severely injured or permanently k1lled.
Together, the three of them get exactly 1 mile away from the Site unhindered before encountering Clef. Bright explains the plan and Clef is on board 100%. Clef has no qualms with mildly breaking the fabric of reality.
The four of them are now home free, hitting three different graveyards on three different states (Texas for Claire, Nevada for Kondraki, Michigan for Iceberg) and stealing three c0rpses.
Cain and 049 translate some of the details in 049's notebook, Bright uses his expertise on the amulet, and Clef bends reality a bit to make all of this possible.
And finally, at the crack of dawn, seven hours later, on a freezing cold winter night in Eagle Harbor, Michigan, James Abel Lumineaux discovers the secrets of necromancy, and Ice, Claire and Kondraki are back.