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 swirling cloud of smoke shot through with white-hot embers 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 2d6 fire damage and is burning 3.
On a successful save, a creature takes half as much damage and doesn’t start burning.
You can increase the damage by 1d6 and the burning level by 1 for each additional catalyst expended.
You can expend 1 additional mana or psi so duration changes to 1 hour/catalyst.