Shadow Weapon

You have some affinity with Shadowfell and the mysterious force responsible for manifesting sentient magic weapons carved from shadows there. You learn how to temporarily will those shadows into lesser forms of such a weapon.

• You learn Spiritual Weapon spell and Sword Burst cantrip. These spells are Warlock spells for you, charisma is your spellcasting ability for them, and they don't count against the number of spells you can learn or prepare. You cannot replace or switch these spells with another.
• Using this feature, you can cast Spiritual Weapon once without expending a spell slot, as a 2nd level spell. You regain ability to do so after a long rest.
• Attacks from Spiritual Weapon cast with this feature gains bonuses as if they were attacks with weapon from Pact of the Blade feature, if you have it.
• Attacks from Spiritual Weapon cast with this feature gains bonuses from Hexblade's Curse feature, if you have it.
• If you cast Spiritual Weapon using your spell slot, you do not add any bonuses from Pact Weapon or Hexblade's Curse.

Additionaly, this feat can be taken as a replacement for Accursed Specter feature upon reaching 6th level in Hexblade Warlock. In that case you lose Accursed Specter feature and gain Shadow Weapon instead.

Due to D&D Beyond restrictions, you'll have to select Sword Burst manually upon adding this feat to your character sheet.