Giant's Wrath

You infuse a handful of stone pebbles with powerful alteration magic. For the duration of the spell, you can hurl one pebble as an attack action that provokes attacks of opportunity. The instant the pebble leaves contact with your hand, its size and the force of your throw increase dramatically, as the pebble transforms into a boulder. The boulder has a range increment of 120 feet, and you must succeed on a ranged attack to strike a target with the boulder. If you hit the target, the boulder deals 2d6 points of bludgeoning damage + your Str modifier. You gain an insight bonus equal to your caster level on attack rolls and damage rolls (maximum +10) with these boulders.   If you drop a pebble or give it to another creature, the pebbles' magic dissipates harmlessly.
 

You infuse up to four pebbles with powerful alteration magic. For the duration of the spell, you can hurl one pebble as an attack when you take the Attack action. The pebbles count as a simple ranged weapon with the Thrown (Range 60/120) property. The instant the pebble leaves contact with your hand, its size and the force of your throw increase dramatically as the pebble transforms into a boulder. You can use your spellcasting modifier for the attack and damage rolls of these pebbles, and on a hit, it deals 3d6 Bludgeoning damage. Hit or miss, the spell ends on the pebble after you throw it.   If you drop a pebble or give it to another creature, the pebbles' magic dissipates harmlessly.   At Higher Levels. When you cast this spell using a higher level spell slot, increase the number of pebbles affected by 2 for each slot above its base level.