Ancient Mithral Mining Boots

You can’t be pushed or knocked over by any means. You always know which direction is up. 

• Set Bonus (2): As an action you can speak the command word and see through up to 30 feet through stone for 1 minute. This sight only allows vision of metal items, and you must complete a short rest before you can use this ability again. 
• Set Bonus (3): You can always breathe regardless of your environment or surroundings. You can use an action to imbue the mithral with any light in the area, causing the armor to instantly light up as though the target of the daylight spell for 1 minute, this light ignores obstacles. You must complete a long rest before you can use this ability again.