A sneer appeared on Devon's face, he had always been four steps ahead of them, so how could any of his planning go wrong.
With the information, he got from Karen and the ones he found out by himself, everything was perfectly executed to the limit that nothing could ruin the plan.
Even when the black sword killed the guard, it didn't affect Devon's plan that much, it just made him more cautious.
Regarding the guards at the inner foyer, since avoiding them was something that couldn't be done, Devon had his way of dealing with him, and his method wouldn't create any disturbance in the main family house.
By pretending to be a guard against the inner foyer, Devon had gotten to the inner foyer without anyone stopping him. He had walked his way here leisurely, the guards who were at the inner foyer were of course more powerful than the ordinary guards.