Weapon

Legendary Requires Attunement

Soul Destroyer Flame, Mark of Destruction. Whenever this sword deals fire damage to a creature that possesses a soul, the target is marked with a dark, charcoal-like burn. This mark signifies the beginning of its soul’s deterioration. The mark naturally fades after 7 days if not reinforced by additional hits.
If a creature is reduced to 0 hit points by the sword’s fire damage, its soul is obliterated. Such a creature cannot be restored to true life by any means except by a Wish spell or comparable divine intervention (e.g., Miracle, powerful ritual magic).

Fire Resistance Decrease. Whenever the Blade of Belial deals fire damage to a creature, it undermines the creature’s innate resistance to fire.
Fire-Immune creatures are treated as fire-resistant.
Fire-Resistant creatures are treated as having no resistance.
Creatures with no resistance are treated as vulnerable to fire damage from this blade.

Hellfire Unleashe. As a bonus action, invoke the power of the infernal gems set in the blade. While active, the sword is draped in blazing hellfire, Every attack made with it deals an extra 2d6 fire damage.
This effect lasts while it is in your hand or untill you use a bonus action to end it.

Hellfire Obliteration (1/Day). Once per day, as a bonus action, the wielder can channel the blade’s full infernal might, coating the weapon in a blazing inferno of Hellfire. The next attack that hits during that turn deals an additional 8d6 + 30 fire damage.