As a bonus action, choose one creature that you can touch or see within 18 meters. The creature must make a Fortitude saving throw.
On a failed save, it loses any resistance to cold damage for the duration and the first time on each each turn the creature takes cold damage, it takes an extra 2d6 cold damage.
You can target two additional creatures for each additional mana or psi expended. The creatures must be within 9 meters of each other when you target them.