A moment ago.
The Plant Lord had reached the top floor.
The person from Septa's squad wrote down on the note to communicate, "There is a path leading to the rooftop if we continue, but it's locked."
The Plant Lord glanced to the side. The stairs still continued even though they were on the top floor. So, it was clear the stairs were leading them to the rooftop.
But since their scout had confirmed that it was locked, they had two options. First, they could go to this floor to check the situation around or they could blast open the door to the rooftop and reach their original destination.
The Plant Lord looked down, contemplating for a moment. He placed his hand on the ground and started channeling a minimum amount of Spiritual Energy as if he was trying to scan the area.
The Plant Lord opened his eyes and grabbed the note.