Solacesteel Plate

Armor (plate), very rare (requires attunement)

This gilded armor is made of purified mourningsteel and repels undead aggression. While wearing this armor, you gain a +1 bonus to AC, and you have advantage on any saving throw against a hostile effect from an undead creature. In addition, you can use a bonus action to touch a creature with 0 hit points. When you do, the creature is stabilized.

If you're a cleric or paladin and are wearing this armor, immediately after an undead creature deals damage to you with a melee attack, it is automatically destroyed if its challenge rating is 1 or lower.

The lich glared down at the gilded knight. "So, you came. I suppose I should be impressed. I am merely disappointed in my legion. No matter—I will finish what they failed to accomplish."

The knight stood, resolute, and drew his blade. "You sent waves of undead. I was simply... unbothered by them. You are nothing but a coward, and I do not yield to cowards. Your reign of terror ends here."