Block chunklets (Mob idea)

block chunklets I imagine as being small living versions of blocks. They each have their own designs and are mostly passive. If they are attacked they turn into their block form which is like an armadillo hiding in its shell. They have a 5/500 chance of spawning when a block is broken. Some chunklets have special quirks such as netherite chunklets being able to swim in lava and cacti chunklets being able to destroy any item handed to it.