Adamantite
#uncommon-material #ore
A dense, lustrous metal with a dark sheen, impervious to scratches. Adamantine is known as one of the hardest substances in existence, and its forged creations exhibit unparalleled strength.
Armor. While you’re wearing an adamantine armor, any critical hit against you becomes a normal hit, unless the attack was with a melee weapon or ammunition made of or coated with adamantine.
Weapon. Whenever an adamantine weapon or piece of ammunition hits an object, the hit is a critical hit.