Arcane Mastery (wizard)

You’re training in the arcane has been focused in casting as many spells as possible and memorizing one that you can cast much quicker 
While moving no more than half your movement each round you may cast one of your spells as a bonus action even if you have used a leveled spell as your action. Choose one spell from the wizard spell list with a spell level equal to or less then 1/5 your class level, you can cast this as a bonus action a number of times equal to your Intelligence Modifier, you may change this spell when you level up. The chosen spell is always cast at its lowest level and counts against your daily slots