ToME: the Tales of Maj'Eyal

So, my alchemist cloned enough Stars to buy himself the Choker
Now, I'm curious:

- does the Elder Vampire summon level with the player, with dungeon depth, or will it not level at all?
- if the summon does level, will it's duration increase as well? It's kinda short-lived as it is now.

Elder Vampire's level is the same as your level but the duration doesn't increase.

Does the level of the spider summoned from the egg sac also the same?