Iaphan

Iaphan (apparently a plural form) were native to the land of Manik in the Frost King's Realm. When Alistair Neezley, Tpxszum and Frederick arrived in Manik and told an old man they'd bumped into after their aim to find the Frost King's treasure, he advised them that they would be foolish to attempt to climb the mountains of Manik without “a team of iaphan and a sleigh”. (PROSE: The Frost King's Treasure)

Behind the scenes

Whether iaphan are a type of animal (perhaps used to pull a sleigh) or a job title of some kind (for specialised mountaineers) is not made clear in the text of The Frost King's Treasure.