As two actions, you can create this bomb. As an action, a creature can throw this bomb at a point within 5 meters, where it explodes on impact. A billowing mass of icy and misty vapors spreads to fill a sphere for the duration. The sphere spreads around corners, and its area 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 area for the first time on a turn or starts its turn there must make a Fortitude saving throw.
On a failed save, a creature takes 2d4 cold damage and is slowed 1 until the end of its next turn.
On a successful save, a creature takes half as much damage and isn’t slowed.
You can increase the damage by 1d4 for every two additional catalyst expended.
You can increase the slowed level by 1 for each additional catalyst expended.
You can expend 1 additional mana or psi so the duration changes to 1 hour/catalyst.