Thalia, Heretic Cathar | Legendary Creature | Human Soldier | First strike
Creatures and nonbasic lands your opponents control enter the battlefield tapped. | Magali Villeneuve
Spell Queller | Creature | Spirit | Flash
Flying
When Spell Queller enters the battlefield, exile target spell with mana value 4 or less.
When Spell Queller leaves the battlefield, the exiled card's owner may cast that card without paying its mana cost. | Adam Paquette