Forge Icons

I would love to be able to forge icons with...let's say, 4 Mastery Tokens (S or S+) and 400 blue essence or something like this. This would be great for some of us who are dedicated just to a few champions...so basically, after you unlock level 7 on a certain champion you will still receive Mastery Tokens whenever you got S or S+...and when you get 4, you go and forge them + some blue essence into a icon with that champion.