Maybe bosses drop?

In Minecraft, for a long time we only dealt with 2 main bosses: the wither boss and the ender dragon.(I'm not counting the Elder Guardian or the warden because they might not qualify as bosses Because they aren't necessary to progress in the game, like the Wither and its star and the Ender Dragon as the final boss). But I've been missing some kind of challenge to achieve something that would advance you, or something like that. a trophy So, in my view, it would be cool to have a drop focused more on bosses, adding to or improving the mechanics (and items) that already exist, such as creaking, warden, etc.