Turn Pebble to Boulder

A pebble you toss grows in size and speed. Anyone in a 10 ft wide, 60 ft line from you must roll a dexterity saving throw, taking 8d8 non-magical bludgeoning damage and falling prone on a failure, half as much damage, and no additional effect on a success. Huge or larger creatures automatically succeed the save. The boulder stops if it hits an obstacle or a Huge or larger creature, not having an effect on anything behind the creature or obstacle if it does. When the boulder stops, it turns back into a pebble.

At Higher Levels: When you use a spell slot of 5th level or higher, the damage increases by 1d8 for each slot above 4th. Additionally, at 6th level, Huge creatures do not automatically succeed the save, and, at 8th level, Gargantuan creatures do not automatically succeed the save.