This is a neat concept!

you know I actually made an Oc like this one…his name is Atomic Beats and hese made entirely of synthetic sentient plutonium…species “Radpony” thought its not an FOE oc…they come form mysterious deep mountain cave cavers in giant egg sacs….but there’s no mother or queen they’re just somehow made….luckily at the time radponies emerged from the ground ponies and humans found a way to make themselves immune to radiation…because they’re not made of flesh or blood they’re literally invincible and as long as they eat radioactive materials regularly can they heal any injury