Throw a huge boulder at your enemies

You grow a chisel into a huge boulder, which you throw at a single target within range. Make a single ranged attack roll against the targets armor class. For this attack roll, you may substitute your dexterity modifier by your strength modifier. If you succeed, the target is hit by a huge boulder. The boulder counts as a two handed magical +1 weapon, with 20/x4 crit and 4d6 base damage and you gain bonus damage from high strength to it, as if it was a two handed melee weapon. Furthermore, your strength receives 10 points enchantment bonus until your next turn.

Focus: None

Material Component: a chisel