Frostfire Bolt

Make a Ranged Spell Attack against a target you can see. On a hit, the target takes 1d12 + half INT Bonus (rounded down) Fire damage and 1d12 + half INT Bonus (rounded down) Cold damage. The target must then succeed on a RES Save against your INT Check or gain Cold(X) where X equals half your INT Bonus (rounded down). On a successful save, gain Cold(X/2) rounded down instead.