War Caster

4th Level Feat, Spellcasting or Pact Magic Feature

Repeatable: No   You have practiced casting spells in the midst of combat, granting you the following benefits:   Ability Score Increase. Increase your Intelligence, Wisdom, or Charisma score by 1, to a maximum of 20.
Concentration. You have Advantage on Constitution Saving Throws that you make to maintain your Concentration.
Reactive Spell. When a creature provokes an Opportunity Attack from you by moving out of your Reach, you can use your Reaction to cast a Spell at the creature, rather than making an Opportunity Attack. The Spell must have a casting time of one Action and must target only that creature.
Somatic Components. You can perform the Somatic Components of Spells even when you have Weapons or a Shield in one or bothhands.