Transform Pebble to Boulder

You transform one pebble you touch into a boulder up to 1,000 cubic feet in volume (a cube 10 feet on a side, or a sphere 12 feet in diameter). If you throw the pebble as part of the spell, it transforms in flight, and you can make a ranged spell attack against one creature within 30 feet. On a hit, the boulder does 6d10 bludgeoning damage.