You have practiced casting spells in the midst of combat, learning techniques useful against other spellcasters, gaining the following benefits:

• When you damage a creature that is concentrating on a spell, that creature has disadvantage on the saving throw it makes to maintain its concentration.
• You can perform the somatic components of spells even when you have weapons or a shield in one or both hands.
• You have advantage on saving throws against spells cast by creatures within 5 feet of you.