It seems to be unrelated to my save, though restarting and reloading the save keeps the bug anyway. After opening the level 2 magic chest, my character is invisible, except weapons. I'd imagine that this could fix at level 3 magic, however that's a big chunk of the game to be broken.

I use a torrented repack version (I do own the game but it's broken as hecc) and that could be the cause. Is there some way to fix this through altering files or?

Edit: Got further now, (without upgrading magic) and it seems upgrading to level 3 also causes this. For some reason, level 1 did not. Also opening melee and ranged upgrades doesn't have the same effect, and it occurs at the exact moment the flash covers my character, and as it fades, he's invisible. If I remember correctly I believe that the gauntlet model or texture changes in that moment.