Green Dragon Mask

Requires attunement.
You have resistance against poison damage.
While you are wearing no armor, you can add
your Cha bonus to your AC. You gain darkvision
out to 60 feet (or an additional 60 feet). Once per
day, you can gain blindsight out to 30 feet for 5
min. You can speak and understand Draconic.
You have advantage on any Cha check you make
against green dragons. Legendary Resistance
(1/Day). You can breathe underwater.