Protean Leather (Patreon)

Armor (Any Leather),  Rare (Requires Attunement)

Leather formed from reduced ooze remains which seems to retain the ability to adapt immediately to elemental assault. 

Elemental Adaptation. When you take acid, cold, fire, lightning, or poison damage while wearing this armor, you can use your reaction to gain immunity against that instance of the damage. Additionally, you gain resistance to that damage type until the end of your next turn.

Once you use this property, it can’t be used again until you finish a short or long rest. 

Flexible both literally and figuratively, this gelatinous leather stretches to fit its wearer whilst keeping them safe from the elements. The process to imbue this property from the ooze’s life is considered a miracle, as a combination of wizards and leathersmiths only managed to do so after years of trial and error.