Although Bloodmoon may not have as much raw damage (elemental or otherwise) compared to some other unique elite weapons, Bloodmoon has a number of other bonuses that are useful.
For one thing, Bloodmoon has a very high chance of Open Wounds, which inflicts damage over a set amount of time similar to the effects of Poison, only it cannot be remedied. Since the damage of Open Wounds is dependent on character level, and Bloodmoon cannot be used until lv. 61, the damage inflicted by Bloodmoon due to its Open Wounds is often high.
One-Hand Damage: (102-118) To (139-162)
Required Level: 61
Required Strength: 109
Required Dexterity: 122
Sword Class - Fast Attack Speed
+210-260% Enhanced Damage
10-15% Life Stolen Per Hit
50% Chance of Open Wounds
+7-13 Life After Each Kill
Level 15 Blood Golem (9 charges)
(Only Spawns In Patch 1.10 or later)