Mage Hunter

The archetypal Mage Hunter develops the ability to resist the forces of the arcane, asserting their presence on reality with physical and mental discipline. Those who model themselves on this archetype learn to enhance their endurance to harden themselves against magical attack, shrug off, and counter arcane and elemental forces, and slice through enchantment with weapons and will.

Arcane Advantage

Beginning when you choose this archetype at 3rd Level, you gain benefits similar to the Mage Slayer feat.

• 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.

Additionally you gain Mage Hunter's mark.

Once per short rest the mage hunter may call out an arcane caster, marking them as their target.  Until the target is dead, the Mage Hunter Gains an extra 1d6 damage on any attack made against the target.  

Arcane Counter

Beginning at 7th level the Mage Hunter becomes adept at countering magical attacks.

As a reaction the mage slayer can focus their will upon weapon or shield to counter an incoming arcane spell in the same manner as the Wizard Counterspell.  The Mage Hunter may do this once per short or long rest.  At level 11, 15, and 19 they gain an additional user per long rest.

Proficient Arcane Resistance

Beginning at 10th level the Mage Slayer gains proficiency on saving throws versus arcane spells in addition to advantage.  This also confers the effects of the rogue talent Evasion, allowing the Mage Slayer to take no damage when a saving through would normally only reduce the effect to half damage.

Arcane Reflection

Beginning at 15 level the Mage Hunter is able to reflect any single target arcane spell back upon the caster once per short rest.  This increases to twice per short rest upon reaching level 19.

Anti-Magic Field

Beginning at 18 level the Mage Hunter may invoke an effect identical to the Wizard Spell Anti-Magic Field once per short or long rest.