My dad got into D&D recently and me and him have been playing for a while and he has a really specific idea for a character. For those who've seen black clover think asta. For those who haven't essentially a barbarian subclass that specializes in countering magic and I have an idea of how it can work and but I wanna check with this subreddit to see if its decently balanced.

Lore wise: when so many mages use and abuse the weave and magic in genral there eventually is a push back from the weave itself creating a person made to defeat mages enter the Path of the Arcane Wrath

COMBATIVE CASTER Level 3: when this subclass is chosen the user has very limited access to spell casting being able to use mage hand, magic missile, spiritual weapon, and shielf of faith as well as having advantage on saving throws against spells

WRATH OF THE WEAVE Also when raging the barbarian gets the following extra benefits - he has resistance to spell damage - and when a spell technically misses he can use his reaction to reflect the spell back at the caster.

ARCANE ABSORPTION At sixth level when the barbarian is damaged by a spell he can use a reaction to halve the damage and then use the same spell up to a minute later with concentration

SPIRITUAL ASSISTANT At tenth level the barbarain can summon a energy copy of himself as a bonus action that has one health point and allows the barbarain to make a second action only being a melee attack from the assistant. Think limited echo knight fighter range is 15 ft

MAGIC NEGATION At 14th level the barbarian can make any spell cast have no effect 5 times and recharges these uses after a long rest

All spells that are psionic are not affected by the barbarian

So I wanna know what the more knowledgeable dnd veterans think about this potential subclass. Too strong too weak, sounds cool? What do you all think?