Jsk Feats:Battle Caster

You have practiced casting spells on the front-lines of combat, learning techniques that grant you the following benefits:
 * You increase your Intelligence, Wisdom, or Charisma by 1, up to a maximum of 20.
 * You can perform the somatic components of spells even when you have weapons or a shield in one or both hands.
 * When you take damage, you can use your Reaction to give yourself advantage on a Constitution saving throw made to maintain your concentration on a spell.
 * During a long rest, you can choose one weapon that you are proficient with to become a spellcasting focus for your spells. Only one weapon can serve as your spellcasting focus, and choosing another weapon causes the first one to lose this benefit.