Whatever made this weapon, its flesh appears to be alive. It could be an abomination's blood magic, a spirit twisted into physical form, or some other affront to the gods. The power thrills right up your arm...
Maker: Black Hand
Unique Attributes: Weapon Bond
2d6 slashing damage. Heavy, two-handed. When attuned to this weapon, you gain a +2 bonus to hit with it, and all attacks with this weapon deal an additional +2 damage. You can't be disarmed unless incapacitated. Summon this sword as a bonus action if on the same plane of existence.