Ravnica Allegiance

Absorb | Instant | | Counter target spell. You gain 3 life. | Izzy

Deputy of Detention | Creature | Vedalken Wizard | When Deputy of Detention enters the battlefield, exile target nonland permanent an opponent controls and all other nonland permanents that player controls with the same name as that permanent until Deputy of Detention leaves the battlefield. | G-host Lee

Lavinia, Azorius Renegade | Legendary Creature | Human Soldier | Each opponent can't cast noncreature spells with mana value greater than the number of lands that player controls. Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell. | Steven Belledin

Warrant | Instant | | Put target attacking or blocking creature on top of its owner's library. | Matt Stewart

Hallowed Fountain | Land | Plains Island | ({T}: Add {W} or {U}.) As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped. | Jedd Chevrier