Spellsword

You have trained in spell and sword, so that you can exploit any moment of martial superiority with your spellcraft. You gain the following benefits:

Spell Training. Increase your Intelligence, Wisdom, or Charisma Score by 1, to a maximum of 20.

Sorcerous Opportunity. When you score a critical hit with a weapon, you may immediately cast a spell instead of dealing critical damage on your attack. The spell must have a casting time of 1 action or 1 bonus action.