Dark One's Blessing
Gain 4 temp HPs when you reduce a hostile creature to 0 HPs.
Breath Weapon.
Cold, 15 ft. cone, [2d6] cold damage, DC11 con save.
Izzet Guild Spells
Prerequisite: Spellcasting or Pact Magic class feature

For you, the spells on the Izzet Guild Spells table are added to the spell list of your spellcasting class. (If you are a multiclass character with multiple spell lists, these spells are added to all of them.)

Cantrip - produce flame, shocking grasp
1st - chaos bolt, create or destroy water, unseen servant
2nd - heat metal, rope trick
3rd - call lightning, elemental weapon, glyph of warding
4th - conjure minor elementals, divination, Otiluke's resilient sphere
5th - animate objects, conjure elemental.

Urban Infrastructure
The popular conception of the Izzet League is based on mad inventions, dangerous experiments, and explosive blasts. Much of that perception is accurate, but the league is also involved with mundane tasks of construction and architecture- primarily in crafting the infrastructure that allows Ravnicans to enjoy running water, levitating platforms, and other magical and technological wonders.

You have a basic knowledge of the structure of buildings, including the stuff behind the walls. You can also find blueprints of a specific building in order to learn the details of its construction. Such blueprints might provide knowledge of entry points, structural weaknesses, or secret spaces. Your access to such information isn't unlimited. If obtaining or using the information gets you in trouble with the law, the guild can't shield you from the repercussions.