@Catpone Cerberus
From in the backroom, Sombra began to look over the various boxes in the back of the shop. He could tell if there was anything worthy of value, he would find it here. While a lot of it had value, he wasn't here to steal and pawn it off to someone else for cash. He was here for the magical artifacts themselves, everything else other than that was simply not his concern. With his shadow form, he'd look through the boxes themselves. If there was anything magical, he would quietly collect it for himself in the corners of each room, and after the searching was done he would momentarily assume his physical form to stash the items within the pockets of his cape. There was a chance that this process could have been interrupted, and what the results would be - would depend on if he was successful in doing it without anyone walking in.