Arcane Tradition
You focus your studies on magic that dazzles the senses, befuddles the mind, and tricks even the wisest folk. Your magic is subtle, but the illusions crafted by your keen mind make the impossible seem real. Some illusionists - including many gnome wizards - are benign tricksters who use their spells to entertain. Others are more sinister masters of deception, using their illusions to frighten and fool others for their personal gain.
The gold and time you must spend to copy a illusion spell into your spellbook is halved.
You learn the minor illusion cantrip. If you already know this cantrip, you learn a different wizard cantrip of your choice. This cantrip does not count against the number of cantrips known. Whenever you cast minor illusion, you are able to create both a sound and an image with a single casting.
Whenever you cast an illusion spell that has a duration of 1 minute or longer, as an action, you may change the nature of that illusion (using the spell's normal parameters for the illusion), provided that you can see the illusion.
You may create an illusory duplicate of yourself as an instant, almost instinctual reaction to danger. As a reaction when a creature makes an attack roll against you, you may interpose the illusory duplicate between the attacker and yourself. The attack automatically misses you, at which point the illusion dissipates. You may use this feature once per short rest.
You have learned the secret of weaving shadow magic into your illusions to give them a semi-reality. Whenever you cast an illusion spell of 1st level or higher, you may choose one inanimate, nonmagical object that is part of the illusion and make that object real. You may do this on your turn as a bonus action while the spell is ongoing. The object remains real for 1 minute. For example, you may create an illusion of a bridge over a chasm and then make it real long enough for your allies to cross. The object cannot deal damage or otherwise directly harm anyone.
Source: Player's Handbook