This is just an idea and its not real
1.19 - The Forgotten update. Basicly this adds features that mojan what planing to add but never came. Lets start with one of the mob votes. This mob voted was for versions 1.13 and above. The phamtom won. The other mobs were a sea monster, a blaze king and a lizard. Theese would be nice to have in the game. In other votings there were an orstridch, a frog and some other mobs. At one point notch was going to add a red dragon that would go along the ender dragon in the v1.0. This dragon would be an overwold boss that was tamable with steak.The ilusioner is in the game but can only be spawn with commands.
Its basicly a ilusion-caster-philager. This would spawn in darkwood mansions or maby a new dungen overall. I think it would be cool to have an surperior oupost and the leader is an illusoner. The illusoner could also drop an illuson caster. Throw this and you will have a clone of you which will do the same as you. Surround the caster in copper you can make a lightning caster which if you throw it, it creates lightning. Combine the illuson with a totem of undying and you can make an illuson totem. When you are about to die you will be given the buffs of the totem of undying and will make you invisable which will make your emeny think your dead but your not!