Darkheart

Weapon (Longsword) Rare

You gain +1 bonus to attack and damage rolls made with this magic weapon.

Holy Blade. When you kill a Humanoid of a different faith, the creature must make a wisdom saving throw equivalent to double the blades damage only. On a fail, the creature submits its soul to Asenrir. As a reward, Asenrir will look past your faith and imbued your weapon with holy power dealing an extra d6 of radiant damage. For the purpose of this weapon, "Humanoid" refers to any creature considered Humanoid.

When the blade is activated it sets alight but not with flame, radiant energy beams off of it as if it were ablaze. These ethereal flames shed bright light in a 20-foot radius and dim light an additional 20 feet past that.

Submission. If you choose to attune to this item, you can gain another d6 to your damage but must convert to a worshipper of Asenrir. After attuning you suffer from 'Conversion' for 2d8+1 Days.

Bonded. Providing the wielder is on good terms with Darkheart, the soul within grants the creature advantage on religion checks. The weapon must be attuned to gain this benefit.

Blade Description

Darkheart is a Longsword, forged of steel and a very powerful soul. The metal is darker than basic steel due to its dark nature. Even though the sword is of Asenrir a predominantly good and bright deity the magic within is one born from desperation in dark times, this evidently took a toll on the blades colour.

The hilt has a large ball within its centre mass, acting as an eyelid to an eye that only reveals itself in times of need and desperation and sometimes upon request. The eye has the ability to turn 360 degrees and view its surrounding as well as communicating through vocal methods not quite apparent.

This central part is much darker and sinister than the blade itself. A dark wrap around the grip a mixture of dark fur and grey leather. A small hand guard shaped almost like horns protecting the ball and handle of the weapon and hopefully the hands of its user.

When Darkheart has activated the blade grows half a foot in length as well as lighting up in radiant flames. When the blade is activated the eye is a lot more active and more willing to respond, however, it is not something that has to happen, it depends on the souls mood and relationship with the creature weilding the weapon.

Dungeon Master Information

Conversion

The DM must roll a d4, this will determine the amount every score will be decreased by for 2d8+1 days. Make sure to remind the player that their conversion and faith now changed has left them shaken and confused and that is why they are not making some checks.Be sure to have other flavours so that player does not feel like they made the wrong choice or are being bullied.

Backstory

In my Campaign, there was a great battle between deities, the deities each had different warriors and those who were the best or strongest were given stronger weapons and promised more time on the material plane. Darkheart was a powerful sword that captured the soul of Gwalter Gorlois, the original wielder. He was slain in his sleep and was not ready to leave the material plane, therefore, granted the ability to stay on the plane by having his soul implanted into the weapon as his murderer had not left.

The character who wields the weapon is considered the champion of Asenrir, this sword is one of a kind but there are others created like it from Asenrir. When Darkheart is nearby another weapon of Asenrir it will lightly hum and if the two weapons cross they will both shatter. They reconstruct themselves at dawn if a soul is inside while shattered it will experience immense pain. If this happens the swords will be telepathically screaming and reduce the wielder's AC by 2 as the screaming is so distracting.

It would be possible to communicate and build a relationship with Darkheart (Gwalter) he was a very religious man and providing he is on good terms with the wielder of the weapon he grants advantage on religious checks

It is unknown how many of these swords exist in the world but it is known that other deities have created similar weapons, defeating the champions of other deities isn't necessarily a good thing either, it is only appreciated when the deity of an opposite alignment, this means that Good on Good causes weapon to shatter, good on neutral will not be appreciated but good on evil will be rewarded.

Credit

Sword Lines: Allentr

Details, Creation and bad colouring: Purry Collins /u/Purryplays

If you are to download this as a PDF please pay mindful tribute to the site that made it possible, The Homebrewery by Natural Crit