Do what needs to be done.

[That's carte blanche to do whatever needs to be done. Words Alucard that will be saying again and again.]

Both are likely options. If it's the latter, then we need to catch up. [Alucard is quiet for a long time. There are other things he must do after this, when the other two are not around to watch him.] Damien might've pitched it as an idea, perhaps, and was given free reign to put it into action.