As two actions, mist sprouts at a point you can see within 20 meters. Each creature in a sphere centered on that point must make a Fortitude saving throw.
On a critical failure, it takes twice as much damage.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
You can increase the damage by 1d6 for each additional mana expended.
A creature can make a Will saving throw at the end of each of its turns, ending the effect on itself on a success.