Inspired by the recent OOTS comics I thought it would be a nice idea to stat out a couple of ‘new’ elementals.

A few ideas

Oxygen elementals should deal fire damage (IIRC pure oxygen burns animals (the group of living creatures, nit the creature type) (and perhaps other living creatures))

Titanium elementals should have DR of high

Gold elementals should be powerful, we all know PCs will grab the remains of this one, better account for it in the treasure, while keeping it balanced with other creatures of it's CR.