Rend the weave of magic in order to spite those weak spell casters!

Arcane slice

Once per turn, when you hit a creature with a weapon attack, you may deal an additional 1d4 force damage (scales like a cantrip)

3rd level- Choose your rending stat (STR or DEX)

Basically gain counter spell and dispel magic using rending modifier. 

Mana Rending

Mana Rending, once per turn if you hit a creature who have cast a leveled spell since the end of your last turn you deal damage equal to your rending mod times your proficiency bonus on a hit.

 

Enhanced Weave Tracking

You have advantage against creatures that had cast a leveled spell since the end of your last turn.

Arcane Endurance

You have endured the arcane forces of magic and your body has adapted to gain resistance to all damage from spells.

You gain resistance to damage from spells

Arcane Warden

You have mastered the art of rending the weave of magic. You gain 2 special abilities to represent this.

Anti Magic Bastion-once per long rest, as an action, you can create the ultimate spell ward for your allies. Choose a number of creatures equal to your proficiency bonus within 30 feet of you. While you aren't incapacitated, you and the chosen creatures gain resistance to force damage and gain advantage on saving throws against spells and other magical effects. This ward last one minute

Spell Parry- as a reaction, when you or one of your chosen creatures in your Antimagic Bastion become the target of a spell that makes an attack roll or requires a saving throw add a number equal to your rending modifier to the targeted creatures AC or saving throw against the spell, potentially causing the attack to miss or the saving throw to succeed