Aura of Spell Sundering

You create a 5ft aura that jams harmful magic from affecting you 

Ranged attack spells have disadvantage and do half damage

DC-based spells have the DC reduced by 3 and on a fail dc check do half damage and on a successful dc check does no damage

6th level cast increases radius by 10ft

8th level cast causes spells that auto succeed to be treated like counter spelled(must require you to make an ability check using your spellcasting ability)