Skaven - Questions on warpstone and immortality

[MyFaceBurns]

I've been playing a skaven character with some success until I got the event death in my 30s. At this point I lost some titles due to the gavelkind succession that is - I believe - forced for all skaven realms. As a result of this, I began wondering how to become one of the few immortal - or at least one of the long-lived - skaven. Is it possible? It seems the older skaven tend to be grey seers, white skaven and grey lords. How do I become one of these?

I also wanted to know if consuming warpstone can do anything other can give you the 'Warpstone Frenzy' modifier.

 

[Tomoike]

Basead on my exp playing skaven, your son have chance to be white or black or normal skaven , don’t know if u can be grey lord, if ur son is white skaven u can make him an grey seer , and the best use for warpstone I think just sell