Argos

You create a 30ft high and wide glass like square barrier. The barrier has a AC of the casters charisma stat (min of 10) and 4x the casters hp. It lasts 1 minute and all spells that target anyone behind it has disadvantage. If it misses, it is absorbed by the barrier instead. If the spell dealt damage, that damage is stored in the barrier instead which is released when it is broken or hit by a melee attack. You can also use a bonus action to move it by 10ft.