Sword of the Cenotaph

Wondrous Item Magical, Cursed, Sentient, Telepathic Legendary [Necromancy]

The user must attune to the Sword to gain any benefits including the ability to cause damage.   Attempting to attune requires a DC17 Wisdom save to avoid permanent insanity. Passing that check requires an additional DC17 Charisma check or the would-be wielder is possessed by the sword. The user can attempt the save again each midnight.   Passing both leaves the weilder in control of the sword, but under constant threat of domination by its superhuman personality. The sword migrates the user's alignment towards NE over time.   The sword of the Cenotaph uses the Wisdom, rather than the Strength modifier, on attacks. This stacks with the wielder's wisdom bonus.   While weilding:

• Confers immunity to Necrotic damage
• Turn/control/destroy undead as if multiclassed with +10 levels of Cleric, with the swords +5 wis bonus
• Sense Undead within 200'
• Thrall undead within 60' must pass a DC15 charisma check or their thrall loyalty changes from their maker/master to the Sword of the Cenotaph