While attuned to the Wither Flame Blade you take on a level of indefinite madness. This madness cannot be cured by any means while attuned to the Wither Flame Blade. You can use a bonus action to speak this magic sword's command word, causing sickly black and yellow flames to erupt from the blade. These flames shed dim light in a 40-foot radius. While the sword is ablaze, it deals an extra 1d6 fire damage plus 1d6 necrotic damage to any target it hits. The flames last until you use a bonus action to speak the command word again or until you drop or sheathe the sword. On a critical hit the target creature must succeed a constitution saving throw of DC equal to 10 plus your proficiency bonus or take a level of exhaustion.

Sentience. The Wither Flame Blade  is a chaotic evil weapon with an Intelligence of 15, a Wisdom of 12, and a Charisma of 14. It has hearing and darkvision out to a range of 120 feet.

The sword can speak, read, and understand Common, and it can communicate with its wielder telepathically. Its voice is harsh and masculine. It knows every language you know while attuned to it.

Abyssal Seduction. The Wither Flame Blade was created by Orcus to seduce mortals into the creation of undead for his armies. Before the command word can be learned, the Wither Flame Blade must judge the wielder evil enough to carry out the demonic will of Orcus. While attuned to the sword, the wielder must commit 50 small sins (petty theft, vandalism), 10 major sins (grand theft, arson, assault), and 1 mortal sin (****, murder) before they are considered worthy. The command word is: Offal.

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Damage: Fire, Damage: Necrotic, creature of evil alignment., Damage, Combat, Versatile, Sap