Niv - Breaks a city block's worth of stone

          Niv-Mizzet, in any case, didn't give Bolas time to right himself. A lance of liquid fire leapt from his throat, directed not down at Bolas but across the zonot, at the rocks and stone that made up the lip. The fabric of the city, walls and buildings and basements, exploded into fragments. Niv aimed carefully, just below the edge, undercutting a huge shelf of stone and buildings as his white-hot breath tore deeper into the substructure. After a few seconds, it lurched, then began to slide, breaking away from the ground and slipping down through the smashed, molten rock into the shaft of the zonot. A huge chunk of stone and masonry, bigger than a city block, came free, breaking into smaller pieces as it tumbled. Wood and stone, brick and iron, people and carriages, thousands of tons of the fabric of Ravnica descended into the depths, cascading down on Nicol Bolas's head.

***

The Gathering Storm, Chapter 18