As two actions, a billowing mass of icy and misty vapors appears in a sphere centered on a point within 20 meters. The cloud spreads around corners and is heavily obscured. It lasts for the duration or until a wind of moderate or greater speed (at least 15 kilometers per hour) disperses it.
A creature that enters the spell’s area for the first time on a turn or starts its turn there must make a Fortitude saving throw.
On a failure, it takes 2d6 cold damage and is slowed 1 until the end of its next turn.
On a critical failure, it takes twice as much damage and is slowed 2 until the end of its next turn.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
As an action, you can cause the cloud to move 2 meters in a direction that you choose at the start of each of your turns. As an action, you can stop the cloud from moving if it is within 20 meters of you.
You can increase the damage by 1d6 for every two additional mana expended. If you expend 4 or more mana, the slowed level increases to 2.
You can expend 1 additional mana so the duration changes to 1 hour/mana.