Spell slinger (Wizard)

You have learned techniques to make your attacks with certain kinds of spells more deadly, gaining the following benefits:

• When you cast a spell that requires you to make an attack roll, you score a critical hit on a result of a 19 or a 20.
• You learn one cantrip that requires an attack roll. Choose the cantrip that requires an attack roll from the Wizard spell list. Your spellcasting ability for this cantrip is Intelligence.
• When another creature targets you with a spell that requires an attack roll, you may use your reaction to cast a spell that requires you to make an attack roll at the same creature. This spells level can not be higher than 1.