Cryovain was dim-witted and cruel like most white dragons.
In the late 1480s or early 1490s DR, frost giant minions of Jarl Storvald reclaimed the place during an absence of Isendraug and Cryovain and took the opportunity to steal all their eggs. Storvald blackmailed the two white dragons to obey his orders or face the destruction of the eggs.
After escaping the frost giants, Cryovain flew south to avoid other more powerful dragons. He killed the orc war chief Kra and drove his tribe of orcs out of Icespire Hold on Icespire Peak, taking the fortress as his new lair. Cryovain terrorized the surrounding areas and the displaced orcs wreaked havoc in the area as well. Cryovain also drove a manticore from its mountaintop nest, which then attacked Adabra Gwynn's home on Umbrage Hill. Cryovain is killed in the Dragon of Icepire Peak campaign.
- Christopher Perkins (September 6, 2016). Storm King's Thunder. Edited by Kim Mohan, Michele Carter. (Wizards of the Coast), pp. 165–166. ISBN 978-0786966004.
- Christopher Perkins (September 2019). “Dragon of Icespire Peak”. In Scott Fitzgerald Gray ed. Dungeons & Dragons Essentials Kit (Wizards of the Coast), p. 7. ISBN 978-0-7869-6683-7.
- Christopher Perkins (September 6, 2016). Storm King's Thunder. Edited by Kim Mohan, Michele Carter. (Wizards of the Coast), p. 155. ISBN 978-0786966004.