You charge a spellcaster in order to interrupt their spell.

When a creature you can see casts a spell, you can use your reaction to move up to your Speed. If you end your movement adjacent to that creature, you can make a melee weapon attack against it. On a critical hit, the spell is interrupted (expending the spell slot) and has no effect.

The battle around you narrows as you focus your ire on a single opponent, ignoring other threats or enemies.

You attack with such fury that your enemy’s magical defenses wither and fail.

When you activate this technique, you take the Attack action and make a weapon attack, as well as any additional attacks granted by Extra Attack. Until the start of your next turn, your weapon attacks score a critical hit on a roll of 19–20, and when you score a critical hit against a creature any spell of 3rd-level or lower on the creature ends. 

If you already have a feature that increases the range of your critical hits, your critical hit range increases by 1 (maximum 17–20).
 

The potency of magic is dependent upon whoever wields it, and whether arcane or divine most spells and spellcasters pale in comparison to your obsessive conviction.

When you see a creature within 30 feet make a spell attack against you, you can use your reaction to defy it. The creature makes a spellcasting ability check against your maneuver DC or automatically misses with its spell attack. 

If the spell is of 7th-level or higher, this combat maneuver has no effect.

You interrupt a spell to stop it being cast.

You strike your opponent with enough force to stun them.

When you activate this technique, you take the Attack action and make a weapon attack, as well as any additional attacks granted by Extra Attack.

You lock eyes with an opponent with a fury so potent that it cannot be ignored.

As soon as you spot the workings of magic nearby you can reflexively draw upon your willpower to fortify your mind, body, and soul.

By submitting to your fervor you make yourself vulnerable but gain an edge on your opponents.

With supreme confidence you march forward with your attack, stepping heavily into every strike and driving each blow home.

When you activate this technique, you take the Attack action and make a weapon attack, as well as any additional attacks granted by Extra Attack.