in act 2 i have found two obviously quest places and one quest object, but i couldn't find who gives that quests.
first - in wasteland there's a cave with bandits in it. when the boss of the bandits talks, the char answers something about blackmailing. i killed them all and couldn't find person who was abused by blackmail.
second - in the devil's caverns level 2 there's an entrance in an ancient tomb. in the tomb is a vampire or so, who says he is the lord of some old empire. then he attacks. i killed him as well, but couldn't find who gives the quest too.
third - i don't know where anymore, but i have found some gravestone with the cross. don't know who wants it.

1. He gives a quest, you can agree to blackmail the inkeeper in Glatzburg or just kill him.
2. No quest here, just exploration.
3. Cornerstone from Devil's Caverns? After you complete the quest to clean and sanctify the Pagan Temple you'll need it for a mini-quest. Return there for details.

First I don't know, but for the other two, the vampire person is not related to a quest of any kind (he's behind a hidden area, being a reward for exploration more than anything else) and as for the stone, you first need to finish the quest with sanctifying the antient temple, then talk to the monks that move there.

I just can´t clean the temple! I´ve killed all the monsters, talked with the statue, killed those monsters, and nothing. I´m stucked here. I´m with the stone foundation with me, just waiting to find those 3 monks and finnaly go to the act 3.
There´s something more to do?

Did you remember to do what you were supposed to do by interacting with the statue again after the fight to properly sanctify the temple and use up your Aspergillum Item which should disappear from your inventory, then finish the quest by talking again to the quest giver Judge Welfar to report your success?

Check your inventory and quest journal to see if either of these are still there.

That´s it!!! The aspergillum its missing... I´ve put it on some chest on some dungeon kkk thank you friend!!!

Had no idea about the vampire lord. Thanks.

There is a priest in the ruins of the Galibornium Pagan Temple that is looking for this stone. He was sent there by Judge Welfhar after he had rewarded you for completing the quest to consecrate the temple.