Comments from the Finger: Try having one of these and a Witch in the same party, I dare 'ya.
Oath of Spellbreaking
Paladins who swear an Oath of Spellbreaking are mortal enemies of sorcerers, warlocks, and all spellcasters of an arcane kind. Witch Hunters, as they are called, are often those who have been victimized by magic users and have dedicated their lives to eliminating their threat. Some Hunters are employed by their church to combat especially dangerous threats, like rogue necromancers or malicious warlocks, yet others operate alone, traveling far and wide, secretly meeting with other Witch Hunters to exchange information, and assassinating powerful spellcasters wherever they go.
Tenets of Spellbreaking
The principles of Spellbreaking are often passed down in secret from master to apprentice before the oath is taken.
Slay Arcanists. Spellcasters of the Arcane are not evil in and of themselves, but they toy with forces too powerful and dangerous for mortal hands. Those who embrace the Arcane or the Occult must be slain.
Hide in Plain Sight. Unwise is the Witch Hunters that waits for his enemies to strike preemptively. Travel often, and go unseen while you observe your targets.
Know your Enemy. In order to possess the power necessary to oppose your enemies, you must know their secrets and understand some arcane spells of your own.
Oath of Spellbreaking Spells
3rd shield, thunderwave
5th detect thoughts, scorching ray
9th counterspell, dispel magic
13th fire shield, locate creature
17th cloudkill, scrying
When you take this oath at 3rd level, you gain the following two Channel Divinity options.
Spell Turning. As a reaction when a spell is cast within 60 feet of you, you can expend your Channel Divinity to reflect that spell upon its caster. The caster must make a saving throw using its spellcasting ability. On a failed save, the spell is instead targeted at the caster, centered on the caster, or dispelled if neither of these apply.
Vicious Strike. When you hit a creature that is concentrating on a spell or other magical ability, you can expend your Channel Divinity to score a critical hit instead.Auravision
At 7th level, you and all friendly creatures within 10 feet of you have the constant effect of detect magic. You can begin and end this effect as a bonus action.
At 18th level, the range of this aura increases to 30 feet.
Mind Over Magic
At 15th level, you have advantage on saving throws against magical effects.
By 20th level, as an action on your turn, you can warp the Weave around yourself to better slay mages. For 1 minute, the spell antimagic field is centered on yourself, requiring no concentration. During this time, you deal maximum damage on attacks against creatures which can cast arcane magic, such as bards, sorcerers, warlocks, wizards, and other sources the DM deems appropriate.
Changelog: 8/22/15: Auravision can be ended and begun as a bonus action.
Antimagic Knight has been reworded to be more inclusive of Warlocks and other non-typical spellcasters.
8/24/15: Antimagic Knight reworded again to be less inclusive of divine spellcasters.