Weapon

Very Rare Negative Energy Requires Attunement

Weapon (any sword)

Enchantment

You gain a +2 bonus to attack and damage rolls made with this magic weapon. Creatures killed by this sword cannot be revived by any means other then a True Wish.

The sword has 1d8 + 1 charges. If you score a critical hit against a creature that has fewer than 100 hit points, it must succeed on a DC 15 Constitution saving throw or be slain instantly as the sword tears its life force from its body (Constructs and undead are immune). The sword loses 1 charge if the creature is slain. When the sword has no charges remaining, it loses this property.

Enchantment Weapon Skill

Fel Aura. As a bonus action you may spend one weapon skill use to emit a degenerative aura centered on yourself. While holding the blade, the aura emanates in a 10 foot radius for the next minute (30 feet radius if your a 18th level paladin or higher). Creatures other then yourself within this aura take 1d4 necrotic damage when they start their turn or end their turn within this radius. Creatures immune or resistant to necrotic damage take full damage from this effect, excluding constructs.

Weapon Properties

The same as the specified weapon's weapon properties.

Weapon Skills

The same as the specified weapon's weapon skills.

Weapon Passive

The same as the specified weapon's weapon passive.

Dark metal and profane smithing have created a truly rare blade of death. Touching the skull patterns and the blades edge, you feel a deep cold within.

Crafting

Based on Heliana's Guide crafting rules

Cost: 40,000 gp + the swords cost
Weight: Varies