The Gauldur Blackbow is a leveled Ancient Nord bow from the Gauldur legend, carried by Sigdis Gauldurson. Its arrows drain the target’s magicka.
How to get it
Defeat Sigdis Gauldurson in Geirmund’s Hall during the quest “Forbidden Legend”.
Leveled stats
The best version appears at level 36+: 14 damage, 18 weight and absorb 30 points of magicka.
Enchantment
Absorb Magicka. It can be disenchanted at an arcane enchanter to learn the effect.
Smithing
Steel Ingot (Arcane Blacksmith); benefits from Dwarven Smithing.
Its sister weapon is the Gauldur Blackblade, taken from Mikrul Gauldurson.