Mr Slaver hops around near the Training Arena in my world. He is a unique mob in that he can't be killed. His hit points are ridiculously high but his attack is so low even an unarmored noob could score a hit but not even an enchanted to the hilt. literally and figuratively, Netherite Sword can scratch him. This makes him uniquely suited to serve as a test dummy for all kinds of weapons. If you want to recruit him to join you as a friend, not a pet don't make the mistake of thinking he can be tamed or you'll lose a hand, you will need to find for him a single BLUE slime block. If you do you will gain a friend forever! Not a very useful friend but hey he's kinda adorkable.