Anything that doesn't already Fit under the previous categories

Myste: A substance that permeates and covers everything in existence.  As far as we know it is something the creator has put into the world but what reason we know not.  Myste works as an unlimited power source but is kept under tight lock and key by the Rona under fear of its potential use of evil. Myste when extracted from the air creates a light transparent blue and its excess is similar to smoke created by steam but with a blue coloration and with no harm to anyone or anything.  Studies show that if extracted a certain way it can actually create a soothing effect and can reinvigorate and stimulate the body which has led to many advancements in medicine, but in to much doses can prove lethal similar to taking too many pills or drinking too much medicine.

BTF:  BTF stands for Before The Fall which means the era of man kind before the nukes hit.

Buried Era: The era of mankind where all that was left was put into fallout bunkers to wait out the nuclear radiation.

Radiation Treated Damascus Steel: RTDS or Radiation Treated Damascus Steel is a new metal created from Damascus steel which is a special hardened metal which has a pattern usually in the form of waves. The Rona government has just started to use RTDS in may weapons in the past fifty years.  It turns out Damascus steel has a unique reaction to radiation which when also combined with Myste hardens the steel making it nearly unbreakable. RTDS is used in mostly armor and weapons but certain  tools are also made with the material too.