The Mage Hunter

The concept is to create an anti-magic subclass. It is very much a WIP, so feedback appreciated

Mage Slayer

You gain the "Mage Slayer" feat, , and you gain proficiency in the "Arcana" skill.

Nose for Magic

You can cast "Detect Magic" and "Dispel Magic" as a ritual, using INT as your spellcasting modifier.

Dispel Magic is cast as a 4th level spell at level 9, 5th level at level 13 and at 6th level at level 17. (equal to proficiency modifier)

Weave Interference

Once per short rest, you can cast "Counterspell". The spell level of this spell is equal half to your total Fighter-levels (rounded down).

Weave Slipstreaming

Starting at 15th level, as a reaction, you can follow a creature that teleports within reach. you appear in an unoccupied spot within 5 ft of the creature.

Mage's Bane

At 18th level, you have become any magic users worst fears made manifest. You gain the following benefits:

• When a creature within 5 feet of you casts a spell, you can use your reaction to make a melee weapon attack against that creature. If this attack is successful, the creature must make a Constitution Saving throw. The DC of this saving throw is either half the damage taken or 10, whichever is higher. If the creature fails, the spell is interrupted and fails to take effect. No Spell slot is consumed.
• 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 and cannot add its constitution modifier to the saving throw.
• You have advantage on saving throws against spells cast by creatures that you can see.