The easiest way to kill this creature is to use something strong like a Spino. Use the Spino combined with a light pet ( The 4 light pets are Glowtail, Featherlight, Bulldog, and Shinehorn) to weaken the nameless. When you kill nameless you have a chance to get an item called “Nameless Venom”. You can use this item to raise your Rock Drake which is essential to go to the Elemental Vault cave on Abberation, going to the surface. And more!