Deplian Badlands Cave is north of Thyphlo Ruins Skyview Tower in the Deplian Badlands.
Cave Location
Deplian Badlands Cave is located at 0305, 3577, 0089, which is north of Thyphlo Ruins Skyview Tower in the Deplian Badlands.
Cave Features
There is a hole in the cave entrance that leads down into a dark area. Throw Brightbloom Seeds at the floor to light up the area. Be warned that there are several Horriblins in this cave.
If you go south, the path will curve to the east. Look to the left to see a tunnel that goes northeast. At the end of that tunnel, you will find this cave's Bubbulfrog.
After you defeat the five Horriblins in the area around the Bubbulfrog cave, the Horriblins' treasure chest will unlock.
After you open the Horriblins' treasure chest, you can go east through another tunnel. When this tunnel splits, you can go north to find a Fire Like that is guarding a rare ore deposit and luminous ore deposit. From there, go south and follow the curving path. Look to the left to find Minetak Shrine.
From there, go north, then west, to find another Horriblin hideout, this time with only one Horriblin.