School of Lazulation

As you train under this vocation, prepare to learn tricks like mimicry, as well as temporarily acquire powerful skills and abilities. 

Mimicry

Beginning when you select this school at 2nd level, you can mimic sounds you have heard, including voices. A creature that hears the sounds you make can tell they are imitations with a successful Wisdom (Insight) check opposed by your Charisma (Deception) check. You can also copy habits and physical traits. You gain advantage on Charisma (Deception) checks to pass yourself off as another person. 

Fulfillment of Mockery

Starting at 2nd level, you gain the ability to temporarily mock, or use, some of your enemies or allies attacks. You can use your action and a spell slot to use an attack for a number of turns equal to the level you used. When using an attack this way, you use the enemies attack modifier as if they were making the attack. If the enemy can make a multiattack, you can mock that attack. 

Reflecting Counterspell

Starting at 6th level, you can now use spells that have been used against you. You gain the Counterspell spell, if you haven't already. When you cast it, you can not just counter the spell, but reflect or, or cast it yourself as part of the reaction of casting the spell. When using Counterspell this way, you only use the spell slot for casting Counterspell, not for the reflected spell. 

Adoption of Traits

Beginning at 10th level, you begin to understand how to use the traits of another creature. You can expend a spell slot to gain access to the abilities of a creature you can see. You can choose which traits you wish to gain, and gain them for a number of turns equal to the level of spell slot you used. You must maintain concentration while holding this ability. You use the creatures stats to use any of their abilities or traits. 

The Storing of Attributes

Starting at 14th level, you can now use a creatures traits even if you can't see them. You can choose a number of creatures equal to your Intelligence modifier (minimum 1) that you can now use at anytime. You can only use each creatures abilities once between long rests. You have to have seen the creature and used an action to memorize their habits and traits to add it to your list of creatures. You can change this list after a long rest.