Mage Slayer

You have practiced techniques useful in melee combat against spellcasters, gaining the following benefits:

• When a creature within reach you can take opportunity attacks casts a spell, you can use your reaction to make a melee weapon attack against that creature.

• When you damage a creature that is concentrating on a spell, they have disadvantage on the saving throw it makes to maintain concentration.

• You have advantage on saving against spells cast by creatures with your reach.