Orenas and the other three Liosan encountered and had a brief clash with Onrack and Trull Sengar in the Nascent. They were then forced to co-operate with Trull, Onrack, and several other T'lan Imass in order to escape the shattered Warren. This ritual allowed the T'lan Imass to kill the demon posing as Osserc.
Now in Seven Cities, they recovered and were able to track down the intruders to the Bonehunters camped outside Raraku's centre: Gesler, Stormy, and Truth. However, after a near fatal encounter with Malazan sappers, they elected to retreat to their own Warren.