Armor of Undead Fortitude

This suit of armor is reinforced with onyx. While you're wearing it, you're immune to necrotic damage and poison damage is half.

The breastplate and shoulder protectors of this armor are made of leather that has been stiffened by being boiled in oil. The rest of the armor is made of softer and more flexible materials.

Notes: Resistance: Poison, Immunity: Necrotic, Bonus: Armor Class, Undead Fortitude: If damage reduces the wearer to 0 Hit Points, you can expand a charge to roll 1d12 + spellcasting modifier and add those hit points, unless the final blow was radiant or from a critical hit., Spilled Blood, Combat, Warding