Arclight The Soul Cleaver

Description.
Arclight, The Soul Cleaver, is a legendary longsword that shimmers with a celestial blue light. Forged in celestial realms, its blade is etched with ancient runes and it's hilt is wrapped in celestial dragon hide. This sword is sentient with a lawful good alignment. Its purpose is to eradicate undead creatures, especially liches, restoring balance and peace to the realms it serves.

Properties:
You gain a +3 bonus to attack rolls and damage rolls made with this magic weapon. When you hit a Fiend or an Undead with it, that creature takes an extra 2d10 Radiant damage. 

While you hold the drawn weapon, it creates a 10-foot area radius Emanation originating from you. You and all creatures Friendly to you in the Emanation have Advantage on saving throws against spells and other magical effects. If you have 17 or more levels in the Paladin class, the size of the Emanation increases to 30 feet. 

• The attuned wielder gains Immunity to Disease and Resistance to Necrotic Damage.
• The attuned wielder gains Advantage on Intelligence Skill Checks.
• The attuned weilder gains Advantage on Death Saving Throws if they are within 10ft of the sword.

 Sentience.
Arclight has an Intelligence of 18, Wisdom of 16, and Charisma of 18. It can communicate telepathically with its attuned wielder and can see and hear out to a range of 60 feet.

Personality.
The sword possesses a noble and commanding aura, filled with a profound hatred for undead beings. It urges its wielder to vanquish undead and acts as a guiding beacon towards such foes

Special Abilities:

• Detect Undead: 60ft will tingle in its attuned wielder's hand and alert them mentally.

• Banish Undead: Once per week, the attuned weilder can use Arclight to perform a ritual (10 minutes) that casts the banishment spell (save DC 18) on all undead within 50 feet. Undead that fail their saving throw are banished to a harmless demiplane for 10 minutes. Undead native to other planes are sent back to their home plane.

• Daylight’s Wrath: Once per day, as an action, the attuned wielder can activate Arclight to radiate intense daylight in a 30-foot radius. For the next minute, this light deals 1d8 radiant damage each turn to any undead creature that starts its turn in the light. 

• Spiritual Spotlight: Once per day, as an action the attuned weilder can use the sword to cast a sunbeam. When cast in this way, the sunbeam specifically targets undead creatures, imposing disadvantage on their saving throws against the spell.

Destroying the Sword.
Arclight, The Soul Cleaver, can only be destroyed if it is melted down by the breath of a celestial dragon then submerged in the waters of a holy shrine devoted to a god of justice. 

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

Notes: Bonus: Magic, Damage: Radiant, Resistance: Necrotic, Resistance: Choose a Damage Resistance, Sense: Darkvision, Advantage: Death Saving Throws, Advantage: Intelligence Ability Checks, Paladin, Cleric, or Fighter, Versatile, Sap