For those of you that have fully completed TLoZ Majora's Mask, the Bloodskal Blade functions like the combination of the Fierce Diety's Mask and the permanent effect of Chateau Romani. I defeated all three forms of Majora's Mask the first time without getting hurt once using this combination. Skyrim weapons should have other items (armor, potions, etc.) that boost its overall power.
Perhaps the Daedric Artifact for Sanguine in TES VI would be a Greatsword that teleports the enemy struck 20 feet above the ground so they plummet to their death. Sanguine is quite fond of pranks. The sword would be called "I Flied?"