The Boiling Sea is located in the north, near the lands of Icewrack and The Barrier. The Blueheart Glacier flows into the Boiling Sea, forming a land of steam and slush. It may be the same as the Northern Sea.
Rylai was once sent to the Boiling Sea by her master, the Ice Wizard. She spent many months in meditation, before waking one day to suddenly speak the word "Snowdrop!". Upon uttering the word, the steam of the land turned to falling snow, and she returned to her master, who was satisfied with her accomplishment.
- Winter Snowdrop description.