As long as their greed surpassed their fear every man, or woman would enter his area and he would be able to do his thing.
Furthermore, if he did it indiscriminately they would think that he was some kind of monster or something, and nobody would be able to find who he really was.
Deciding all this quickly he immediately placed his 'Life's Regret' above ground, right above his position in there.
After putting the dryad spirit into the saber, and the fact that it had tasted some of his blood during Heaven's Rage, even the sword's spirit had taken the traits of his bloodline.
It was surprising, but he had a feeling that no one besides him, or those possessing his bloodline would be able to wield that sword.
And even if one tried to do it, then the vampiric trait of the sword would be too much for them to handle, and their blood would be sucked out of them.