Demon Lords and other unique summons

[olaf73]

No idea in Dom2 but the only stealthy Demon Lord I have seen is Belial.

[Edi]

noname said:
The description trys to throw you off by saying that there are only three known demons lords... I guess Pazuzu is the fourth, unknown demon...

Which description? The 3.06 description of Bind Demonlord does not mention any specific number. It only says "very few". If the descriptions of the Demonlords themselves refer to only three, those arer holdovers from Dom2.