Lightbringer and Stannis Problem

[Spaceman_Spiff]

Stannis Baratheon disappeared off the map (report says hes a prisoner of westerland (report is over 100 game days old so im pretty sure he's gone)

Not long after that "Dragonstone has been defeated" and so now I am worried I will never get to see the unique weapon of his : Lightbringer.

Does anyone know if it's good or has a cool animation?  Or have they heard of this problem of kings disappearing for an incredibly long time?

Thanks!

(PS. i used cheats to get truesight and looked for him in every castle and town and group holding prisoners, he is definitely GONE)

[Indo95]

When factions are destroyed, usually they'll be hiding wity another faction, but it may take some time or it may not even happen at all