The New account Hextech Theory
(Just found out that this doesn't work, Rest in peace) I was thinking about how you could get specific skins / champions easier with the hextech crafting system, and I think I may have cracked the code.
The procedures would be simple, make a new account, buy one and ONLY one champion. Then, get yourself some chests or play for key fragments. Re-roll three skins into a skin permanent, which can only apply to champions you own. Proceed to get only skin shards from the one champion you own. Ezpz lemon sausage. For example, if I only OWNED udyr and no other champions, I am 100% guaranteed to get only udyr skins (Can almost taste that spirit guardian udyr).