Frost Magic

Frost Magic (凍寒の魔法, Toukan no Mahō), otherwise referred to as the One Ice Magic, was a Caster-type Magic and the Ancestor Magic of Ice Magic, Ice-Make, and Snow Magic before it gradually diverged off to various interrelated branches during the height of Earth Land's Last Dark Age. Frost Magic was considered to be the truest form of Ice Magic, superior in all aspects of Ice Magic to such an extent it could be used to create wide-spread ice phenomenon that no normal Ice Mage could ever accomplish.

Due to the branching, the practice of Frost Magic had largely gone into disuse, falling into obscurity and near-extinction in the ensuing centuries. The last bastion of Frost Magic was purportedly Iceberg, where it was traditionally taught to the Great Knights of Iceberg.

Trivia

 * Frost Magic had oftentimes been incorrectly referred to as a Subspecies Magic, largely in part to the public's unfamiliarity with the Ancient Magic.
 * The Frost Magic of the Great Knights of Iceberg were particularly extraordinary, as they have managed to completely synchronize themselves with the very essence of Frost Magic.