Hole of Iron

The final and hardest cave in the Valley of Creatures, and it has a special treasure that helps quite a lot, but the boss is a force to be reckoned with!

Floor 1
5x Dwarf Bulboid

2x Bulboid

Floor 2
4x Bionic Flint Beetle

Floor 3
10x Bionic Blitso

Floor 4
Boss: 2x Man-at-Legs

10x Bulboid

Treasure!
The only treasure is on the final floor, and it only appears once all of the enemies are killed. It is the Extraordinary Wonder.