Elytra quests and rewards

The elytra is a late game item granted to the player once he has beaten the final boss and raided an end city , so why not make late game a little more fun . My suggestion is elytra skins that players can get by completing hidden (or not) side quests/achievements!For example , one could be fighting a phantom in the air and killing it , granting players with the completion of a quest called "It takes two to tango" and awarding them with phantom wing like elytra. Another could be flying 500 blocks high during night time which will give the player the "Stary night " quest followed by an elytra skin of the night sky .There are so many possibilities and they will overall be a fun implementation:)