Three issue mini-series. Part of the Uncanny X-Men Vol. 5 series as it bears the Legacy numbering of issues 635 - 637. It is set between issues 15 and 16 of the ongoing series.
Collected EditionsWar of the Realms OmnibusWar of the Realms: Uncanny X-Men
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/war-of-the-realms-uncanny-x-men/4050-118545/).
