Path of the Death Knight: Harbinger of Doom (Charisma) (UA)

You gain the following benefits.

Ability Score Increase. Increase your Strength, Constitution, or Charisma score by 1, to a maximum of 20.

Ill Omen. You always have the Bane spell prepared. Charisma is your spellcasting ability for this spell. You can cast it without expending a spell slot by expending 1 Death Point. You can also cast the spell using any spell slots you have. When you expend Death Points to cast Bane, affected targets subtract 1d6 from attack rolls and saving throws instead of 1d4.