Found by the group frozen in a cage within Morrow's vault X2 does not remember much about his past or where he is from. He remembers his 'Master' who mistreated X2 and send him on perilous missions to hurt people. X2 know he did not like doing this for his master or how his master treated him but he also remembers his master as being the only person who has ever looked after him, fed him and housed him.
After a short time travelling with the group they meet The Ancient One - a powerful being that has lived beneath the city of Sieronna long before "the newcommer gods had their petty war". The Ancient One offers to help X2 find his family and origins and so he leaves the group to start a new journey.
