Hidden Top is a vital item. for it. You should allways have a few, because if you use one, you cant reuse it. What it does is uncover any hidden Chests, Trees, or junk you can sell for around $5-$5000. they cost $750, but they normally pay for themselfs with what you can find. You can also find secret stairways, trapdoors, or ruins with it, but the hidden top will just buzz around it, as it cant remove whats covering it. Because of this, try to see if anything around it can help.