Rank Based Emojis

So I had this idea about how all of these brand new emojis are being added when people Nitro Boost servers.

My idea was, have the ability to make some emojis only be used if said user had a certain rank in a Discord. At default, everyone can use the same emojis. But, for some ranks, such as lets say, chat ranks, have more emojis that can be used in the Discord than normal members.