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. Hence, it is available to Rief and Amiti.

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.

Coldforge: “Strike with cold that freezes life.”: This costs 12 Psynergy Points, and has a range of three targets.

Frostbite: “Strike with a bitter chill that reaches bone.”: This costs 20 Psynergy Points, and has a range of three targets.

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.

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."