Rune Sword sword_rune

What it is for

A Sword-type weapon. Requires level 31 to equip.

Adds 290 physical attack. Has 3 card slot(s). Damage against Undead +10%.

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 11,000 gold. Weighs 70 of your carry capacity — and weight is what stops drops once the bag fills up.

The best source is Skeleton Guardian, at 0.051% per kill. You can farm it at Old Crypt.