Trial keys

I think the vault should give you another key that leads you to another structures like bastions,ocean monuments,end ship,etc.Make a secret room and add their own trial spawners and keys at the structures and spawn its representative mob,like piglins in bastion.The order should be random,but it should end at the ancient city.At the ancient city,if you insert the key into the trial spawner,it would summon a warden,which has double the health of a normal one. Once the warden is slain,the spawner would either light a portal to another dimension,or give a new item that is insanely good.PLEASE MOJANG