Arcanist

Arcanists, though not as well-versed in the intricacies of specific schools of magic as other Wizards, are more devoted to learning the other forms of erudition available in the mundane world around them. Most notably, an experienced Arcanist's extensive study in multiple fields of magic reflects in their ability to concentrate on two demanding spells at once. Their studious abilities are unrivaled; their understanding of their own limits, unparalleled.

Additional Studies
Beginning when you select this school at 2nd level, your extensive studies grant you the following benefits:
 * Two additional Wizard cantrips.
 * Proficiency with Alchemist's Supplies and the Herbalism Kit.
 * Proficiency in two Intelligence-based skills of your choice.
 * Proficiency in any one skill of your choice.
 * One language of your choice.

Split Concentration
At 6th level, you gain the ability to split your intent on two demanding spells at once. You can now concentrate on two spells at once, but suffer a -5 penalty to your Armor Class and saving throws while the concentration on the two spells persists. These penalties cease once you're only concentrating on one spell.

When being forced to make a Constitution saving throw to maintain concentration while concentrating on two spells, the first spell cast of the two is the one that is lost on a failure.

This ability can be used an amount of times equal to your Constitution modifier per long rest (minimum of 1).

Prodigious Acolyte
At 6th level, choose two of your skill or tool proficiencies. You gain Expertise in the chosen proficiencies. At 10th level, you can choose two more of your proficiencies to gain this benefit.

Fortitude Arcana
At 10th level, as a result of having practiced pushing your spellcasting ability to its limits extensively, you gain proficiency in Constitution saving throws.

Spell Resistance
Starting at 14th level, you have advantage on saving throws against spells.

In addition, you have resistance against damage from spells.