do the monsters in blackthorn's dungeon have tainted life force aura like Corgul

[Kojak]

and Scalis where it makes you lose health instead of gain it with hit life leech?

 

[Merlin]

Some of the Necromancers definitely do, but not all of the captains.

 

[Yadd of Legends]

If I remember from soloing a lot of them, the necromancer and assassin captains drain your health if you use life leech.
Soloing BT Captains

 

[BeaIank]

Necromancer and assassin have corrupted aura, but they are the only ones who do.

 

[Ruppy2]

For my newb question of the week then, are the Silent Death the same-ish? Something seems different with them.