Not only that, he is an influential person within the Fallen Houses.
This was part of a Eliksni pact.
All he could do was hang on as the last days of the Eliksni played out in his mind.
He used this to recruit various imprisoned Fallen to join the House of Judgment, in an attempt to reunite the Fallen houses and factions and return to the traditional ways of the Eliksni.