Cold Snap Psynergy series

Cold Snap, Coldforge, and Frostbite are a series of Mercury attack Psynergy featured in Golden Sun: Dark Dawn. It is available to Mercury adepts who equip the Ice Queen, a Utility Psynergy item earned by defeating the boss of the same name. Hence, it is available to Rief and Amiti, regardless of what class they are in.

Psynergy spells
Cold Snap: "Freeze pools of water into ice.": This costs 5 Psynergy Points, and has a range of three targets. This is also a Psynergy that can be used in the field; it can be used to freeze tiny puddles of water to make them grow into tall, icy pillars that one can hop onto. In battle, it resembles cold gusts creating a small chunk of ice to burst near its targets. Coldforge: "Strike with cold that freezes life.": This costs 12 Psynergy Points, and has a range of three targets. Stronger polar winds create a larger block of ice to grow and explode at the target location. Frostbite: "Strike with a bitter chill that reaches bone.": This costs 20 Psynergy Points, and has a range of three targets. Icy winds generate a huge ice crystal that shatters violently.

Cold Snap as a utility Psynergy
Cold Snap functions identically to Frost; it can be used to freeze puddles of water into frozen ice pillars. This is integral to solving many puzzles, as the ice pillars can be used as platforms.

Analysis
Similarly the Arid Heat Psynergy series, the entire Cold Snap series is automatically learned once the Ice Queen has been equipped. While both Amiti and Rief can learn it, Rief generally profits more from the series. Rief, in his base Water Seer class series, has few offensive Psynergies available to him. Learning the Cold Snap series helps to mitigate this weakness by providing him another series of Psynergy. Amiti, on the other hand, has more options available to him.

Also worth considering is the relative power of Frostbite in comparison to when it becomes available. For example, both Amiti and Rief learn Deluge, which uses the same PP as Frostbite, at Level 30. Meanwhile, Frostbite becomes available around 10 levels earlier, depending on how much the player has leveled up for the boss battle against the Ice Queen. Rief's naturally high PP allows him to more easily exploit Frostbite's power. Overall, the Cold Snap series will remain a viable attacking option for much of the game.

Its encyclopedia entry reads as follows:
 * "This water-based Psynergy produces an arctic chill. By focusing its power on a specific point, the user can turn a water source into a pillar of ice."