You can channel pure earth elemental energy into a concentrated bolt as a action: you can fire this at a creature within 30 feet, it is a ranged spell attack with con as the casting stat. if you hit the creature takes bludgeoning damage equal to 3d6 + your Constitution modifier. You also gain temporary hit points equal to half the damage deal, you can do this a amount of times equal to your prof mod this increases in power at lvs 5-7-9-11-13-17