Rune Armor armor_rune

What it is for

Armor piece for the Body slot. Requires level 31 to equip.

Adds 21 defense. Reduces damage taken by 2%. Has 2 card slot(s). Max HP +5%.

Part of the Runic Vigil set (11 pieces). With 2 pieces: EXP gained +5%. With 4 pieces: Chance to cast a Holy strike on attack 4%, Damage taken from Undead −10%.

Sells to an NPC for about 19,025 gold. Weighs 110 of your carry capacity — and weight is what stops drops once the bag fills up.

The best source is Frozen Dead, at 0.17% per kill. You can farm it at Ice Caverns.