Ttrpg idea - an Eater

 An idea for a ttrpg character/class/race - 

Eater - can eat anything and get stronger. Depending on what they eat effects how they get stronger. If they eat rock or metal they get stronger skin and muscles. If they eat something magical they can gain some of it's magical probertites. 

There are limits on the among they can eat however. As a newborn can't eat what an adult can so a young eater can only eat a small amount of an unnatural food like metal, rocks, etc. Just a little bit and they could be stuffed/bloated for days, weeks, etc. As they grow and eat more their stomachs can handle more. Just like growing it's a slow tedious process but rewards continual focus.