New Concept For "Mystery Raffle"

I have thought of a new addition to the store that would be interesting. What if you could pick 5-10 champions and then for a price: (higher than 490 rp) get a random mystery skin from those champions. It would be just like buying a mystery skin but you could choose the champions you wanted. As a tradeoff it would cost more rp than a normal mystery gift. What do you think? Would you want it?