Path of The Arcane Feast.

As wizards draws on magic, these barbarians feeds on magic. Some barbarians have developed an unusual taste and hunger for magic, a hunger that'll stop at none until it has been quenched.  These warriors will go to great lengths to find sources of magic to consume, some even captures wizards or any other spell user and imprison them as a food source, to feed upon their magic. However, there are few who are able to control the hunger and keep it in check, consuming magic only when necessary such as in battle. By consuming magic these warriors are able to strengthen themselves against magical effects and even making them a danger too all who uses magic. 

Note) Still work-in-progress. 

Magical Flesh

Consuming magic has altered your very own body making you more resilient against magic . At 3rd level when you adopt this path, you now gain resistance to acid, fire, cold, lightning, thunder, force, necrotic, and radiant damages and you add your proficiency on all saving throws against magical effects when you are in rage. 

Magical Fury

At 3rd level, when you adopt this path, you can channel magical fury into your weapons strikes. While you are raging, the first attack on each of your turn that hits a creature takes a extra damages equal to 1d6 + half your barbarian level. The extra damage can be acid, fire, cold, lightning, thunder, force, necrotic, or radiant. This feature can be added to your unarmed strike as well. You can choose any type of damage when you gain this feature. 

Greater Fury

Your fury becomes so great that nothing can stop you.  At 6th level, your Magical Fury ignores resistance to the damage of the chosen type. when you roll for an attack you now roll a 1d8 + half your barbarian level. This imply for your unarmed strikes as well.

Aura of Feasting

At 10th level, Your very presence consumes the magic around you.  you emanate a void-like aura when you rage. the aura extends to 15 feet from you in every direction but not through total cover. Once per rage any creature (friend or foe) within 15 feet of you can no longer caste spells . any conditions or magical effects caused by magic is removed. Any concentration spells (ex.Wall of fire, Darkness, etc) is canceled if the caster or affected creature is within your range. 

Devour the Magic

At 14th level, your hunger for magic nourishes your very body and soul. 

When you succeed in a saving throw against a spell, you can use a reaction to instead take the damage amount and heal an equal amount of hit points equal to the spell damage. If the spell heals you beyond your max hit point, whatever left over becomes temporarily hit points, this does not stack. you can use this to an equal amount of times to your Constitution modifier (minimum of 1) after that you must take a long rest to use this feature again.