I feel like all that was needed for the arcane childhood friends au to become reality was Jayce eating his damn sandwich.
Think about it, powder doesn’t notice the sandwich, she doesn’t find the hex crystals, no explosion, Jayce kicks down the door, grabs powder, Vi goes back for the rescue and punches him in the gut, Caitlyn tackles her and blushes furiously when their faces get really close, Powder start pulling on her hair, this goes on for like twenty minutes. Mylo and Claggor were off getting Vandor who returns all the items to Jayce, who decides not to press charges cause they’re just kids, maybe hires powder as an assistant. Caitlyn and Vi develop huge crushes on each other and everyone can see it
Damn it Jayce this is why you need to FEED yourself