List of Morph mobs
Whenever you kill a certain mob, the opportunity to morph into it opens up.
After that you will be able to open the Morph Menu to turn into it. Here are ways to do it:
After that, a special menu for the mob morping will open.
You can unlock all mobs on survival mode by type: "/function unlock_all_morph_mobs" on the chat
You can morph to mob without open morph menu with type M <Mob Name>