Nivix, also known as the "Aerie of the Firemind," is the home of Niv-Mizzet and the central guildhall of the Izzet . Nivix is a massive tower, one of the tallest in Ravnica. Every level houses Izzet alchemists, mages, and sages who are constantly theorizing, experimenting, and tossing miscalculated experiments across rooms. The very top of the tower is the aerie of Niv-Mizzet himself. Every Izzet who lives and works in Nivix has been hand chosen by Niv-Mizzet. Although none of the experimentations in Nivix seem connected, the great dragon treats them all as if they were part of one grand experiment.