Wardens have a spell attack modifier of (+5) 1d20+5 and a spell save DC of 13  

• Cantrips: Message, Booming Blade
• 1st Level (3/day): Alarm, Shield, Protection from Evil and Good, Faerie Fire

Warden's Resolve: Whenever the Academy Warden's hit points drop below 50% (36), the Warden gains resistance to bludgeoning, piercing and slashing damage.   Bookmark: Any creature that is marked by an Academy Warden subtracts 1d4 from its saving throws against the Warden's spells.   Warden's Grasp (Bonus Action): Until the beginning of the Academy Warden's next turn, the Warden cannot move, and each Large or smaller creature of the Warden's choice within 5ft can't willingly move away from the Warden unless they first take the Disengage action.   Warden's Mark (Bonus Action): The Warden marks a creature they can see within 30ft. While a marked creature is within 5ft of the Warden, the creature has disadvantage on any attack roll that doesn't target the Warden. This lasts for 1 minute, or until the Warden marks another creature, becomes incapacitated, or dies.   Ensnaring Mark (1/Rest): As Warden's Mark, but the target is also teleported to an unoccupied space within 5ft of the Warden.