Spell: Pillar of Water

You create a large, self-contained cylinder of still, clear fresh water. You choose the radius and height of the pillar, to a maximum radius of 15 feet and a maximum height of 60 feet. Creatures inside the pillar can Swim through the water as normal (DC 10 Athletics), or if the spell was cast on solid ground, walk along the bottom (which is difficult terrain). Any creature that exits the pillar falls or lands accordingly.