Hydaelyn

You manipulate earth aspected aether to raise the land in a 20ft. square to a height of 20ft. You can choose to raise the area slowly, harmlessly lifting creatures, or quickly, dealing damage and knocking creatures prone if they fail a Constitution saving throw. If you choose to raise the area quickly, all creatures in the affected area must succeed on a Constitution saving throw or take 6d6 bludgeoning damage and be knocked prone, or take half as much damage and suffer no other effects on a success. You may maintain concentration to keep the platform raised, or return the ground to its original state afterwards. At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the quick ascension deals an additional 2d6 bludegoning damage for each slot level above 5th.