The Necrosword

The Necrosword is a sword with powers of umbrakinesis wielded by Gorr the God Butcher.

History
Gorr the Godbutcher was a slayer of gods and an enemy of Thor. His sword, acquired through unknown means, is incredibly powerful.

Passive Abilities
God-Killer: This weapon ignores all immunities and resistances to physical and a single type of damage (Necrotic)

Resistance: This item gives you resistance to a single damage type (Necrotic).

Fortify Health: You gain 30 base health while wielding this weapon.

Regeneration: You regain 1d8 + Health Modifier Hitpoints after taking damage or landing a hit.

Power Immune: The artifact is immune to all effects and powers not cast by the wielder. This doesn't extend immunity to the wielder. It cannot be broken, transported (seperately from the wielder), or altered by an opponent.

Darkvision: You gain darkvision with a range of 120 feet.

Active Abilities
Umbrakinesis: You gain the following spells while attuned to this weapon. You are able to cast these spells without the normal materials. If your class does not have spell slots, use the Asgardian spell slot list. Black Beserker: As a bonus action you can take 1d10 + 5 temporary Necrotic damage to magically summon a hound of ill omen to target one creature you can see within 120 feet of you. The hound uses the Dire Wolf's statistics, with the following changes: difficult terrain. The hound takes 5 force damage if it ends its turn inside an object. target's location. If the target was hidden it is no longer hidden from the hound.
 * The hound is size Medium, not Large, and it counts as a Monstrosity, not a Beast.
 * It appears with a number of temporary Hit Points equal to half your player Level.
 * It can move through other creatures and objects as if they were
 * At the start of its turn the hound automatically knows its

The hound appears in an unoccupied space of your choice within 30 feet of the target. Roll Initiative for the hound. On its turn it can only move toward its target by the most direct route and it can use its action only to attack its target. The hound can make opportunity attacks but only against its target. Additionally, while the hound is within 5 feet of its target the target has disadvantage on saving throws against any spell you cast. The hound disappears if it is reduced to 0 Hit Points. Once it is reduced to 0 Hit Points, you regain the damage taken as a result of summoning the hound.