_Prerequisite: The ability to cast at least one spell_ You have practiced casting spells in the midst of combat, learning techniques that grant you the following benefits: - You have [[Advantage]] on [[Constitution Saving Throw|Constitution Saving Throws]] that you make to maintain your [[Concentration]] on a spell when you take damage. - You can perform the [[Somatic Components]] of [[Spells]] even when you have weapons or a shield in one or both hands. - When a hostile creature’s movement provokes an [[Opportunity Attacks|Opportunity Attack]] from you, you can use your [[Reaction]] to [[Cast a Spell]] at the creature, rather than making an [[Opportunity Attacks|Opportunity Attack]]. The [[Spell]] must have a [[Casting Time]] of 1 action and must [[Target]] only that [[Creature]].