In game way to remove phantoms

I was thinking that it could be good to add a way to stop phantoms from spawning in the game in a way that doesn't involve just using some command. It could be something in the end - it could be that when you drink a certain potion that can't be crafted that the player who drinks that potion loses the insomnia effect (or it could be implemented in a different way, this is just the idea I thought of). This way it makes it as a quest for the player to reach a goal that greatly benefits them, and also encourage exploration of the end. I guess people could say this would come with an end update.