Okay wtf??

Me and my friend have been playing Dregora for a while now. And most of the mimics we've gotten so far just drop these. What good are they?

https://preview.redd.it/nrflzyyvuf7e1.png?width=518&format=png&auto=webp&s=b7444321ae1f23813ee3bb21d64b2ad6f564c7ba