Omens of Ice, also known as Aion 5.6, is the most recent major expansion of Aion released on July 19th, 2017. It will be the first NA expansion to feature the Dragon Lord Ereshkigal as the main antagonist as previously alluded to in 5.0 and 5.3 as 5.5 did not get a individual release. In Korea, it was released as under the title Immortal: Challenge on February 22nd, 2017.
- New instances: Bastion of Souls, Trials of Eternity, and Crucible Spire.
- New PvP arenas: Grand Arena of Tenacity and Evergale Canyon.
- An up-gradable pet type known as minions.
- Improved enchantment system.
- A visual update for the starting areas for both races.