Spellsword Initiate

You have been mentored under a powerful spellsword or seen a vision granting you arcane power in your dreams. You gain the following benefits.

Two Cantrips. You learn the booming blade cantrip, as well as one other cantrip of your choice from the Wizard spell list. Intelligence, Strength or Dexterity is your spellcasting ability for this feat’s spells (choose when you select this feat).

Shadow Blade. You always have the Shadow Blade spell prepared. You can cast it once without a spell slot, and you regain the ability to cast it in that way when you finish a Long Rest. You can also cast the spell using any spell slots you have.

Stable Mind. You have advantage on concentration checks made to maintain your Shadow Blade.

Note: Since shadow blade and booming blade are not part of the free rules, I can't automatically add them to a character sheet.