This subclass has received significant changes
Starting at 2nd level, you can weave magic around yourself for protection. When you finish a short or long rest, you can create a magical ward on yourself. The ward has a hit point maximum equal to twice your wizard level + your Spellcasting modifier. Whenever you take damage, the ward takes the damage instead. If this damage reduces the ward to 0 hit points, you take any remaining damage. The Ward benefits from any resistances or immunities that you possess. If you use a spell slot of 1st tier or higher to cast an abjuration spell, you can simultaneously use a strand of the spell’s magic to cause your ward to regain hit points equal to five times the spell tier. The Ward’s magic lasts until you finish a short or long rest or until you create a new ward.
When a creature that you can see within 30 feet of you takes damage, you can cause your Arcane Ward to absorb that damage. If this damage reduces the ward to 0 hit points, the warded creature takes any remaining damage.
When you reach 6th level, you add your Spellcasting ability modifier to the amount of hit points recovered when you cast a spell.
When you reach 6th level, you add Counterspell and Dispel Magic to your spellbook. If you already had Counterspell or Dispel Magic in your spellbook you may choose another wizard spell of 3rd tier or lower to add for each you already have. Counterspell and Dispel Magic always count as prepared but don’t count against your Wizard spells known.
When you make a contested ability check as part of a Counterspell you have advantage on the roll, and if you succeed at a Counterspell that you cast the other caster loses their spell slot in addition to having their spell fail.
Starting at 10th level you have advantage on saving throws against magic and have resistance to the damage of spells.
Beginning at 14th level, once per turn when a creature you can see damages your Arcane Ward you can force them to make a Charisma saving throw or be banished to a harmless demiplane until the end of their next turn.