Staff, uncommon
This staff is made of a cluster of bioluminscent mushrooms atop a mycelial column. While holding it, it emits dim light in a 10-foot radius. You can use an action while holding the staff to plant it in the ground at your feet, sending out a magical network of branching, mycelial roots in a 60-foot-radius circle, centered on the staff and spreading around corners. The roots remain for 1 minute or until you move or are no longer holding the staff. For the duration, you and any other creature touching the staff gains tremorsense within the roots' area, out to a range of 60 feet. A creature that has this tremorsense has advantage on any Wisdom (Perception) check it makes to detect a creature within the area, and can make the check as if it were in any space within the roots' area. Once this property of the staff has been used, it can't be used again until the next dawn.
"So how did you know about the hidden basement?"
"Oh, I have an extensive underground network."