As an action, a thin layer of ice covers the ground in a sphere centered on a point within 10 meters and turns it into difficult terrain.
A 1-meter square of ice has 3 health. The ice is an instantaneous effect, but persists as nonmagical ice. Under temperate conditions, the ice lasts 1 minute. In tropical environments, it might last only half as long. In cold environments where ice and snow persist without melting, it could last indefinitely.
You can expend 1 additional mana so a number of objects equal to the mana expended within the sphere that aren’t being worn or carried are frozen cold for the same duration as the ice slick. A creature that touches an object covered in this ice takes 4d6 cold damage when it touches the object and at the end of each of its turns while touching the object.