Armor (Chain Mail or Chain Shirt), Rare (Requires Attunement)
Grown up through the petrified marrow of the Marrow Roads, each link laced with pale bone-fungus. You have a +1 bonus to Armor Class while wearing this armor.
Bone Ward. When you take Necrotic damage, you can use your Reaction to have the fungus drink it, giving you Resistance to that damage until the end of your turn. You can use this a number of times equal to your Proficiency Bonus, regaining all expended uses when you finish a Long Rest.
Source: Sporebound