As two actions, you create a vial of glue-grey liquid. As an action, a creature can coat one weapon with the oil to cause it to freeze a creature it hits. Alternatively, a creature can throw this vial at a point within 5 meters, shattering it on impact. A cloud of frozen air affects a creature in the space where the vial shatters. The creature must make a Fortitude saving throw.
On a failure, it takes 4d6 cold damage and is stunned until the end of its next turn.
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 6d6 for each additional catalyst expended.
You can expend 1 additional catalyst so the duration changes to 1 minute/catalyst, unstable and the creature is stunned for the duration. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
You can expend 1 additional catalyst so the creature is paralyzed instead of stunned.