Nest of Evil/Challenges

Each arena holds a group of monsters situated in a way to make the most of their capabilities against the player. Excluding boss areas, all of the rooms can be left after one minute of survival. Here's a list of all monster groups, starting with the first floor:
==Round 1==
===Floor 1===
Dead Warrior ×2, Quetzalcoatl ×1
===Floor 2===
Demon ×2, Bone Ark ×1
===Floor 3===
Lightkeeper ×5, Mothman ×2
===Floor 4===
Minotaur ×4
===Floor 5===
Final Guard ×1, Jack O'Bones ×4
===Boss===
Category:Portrait of Ruin Enemy Data
Category:Portrait of Ruin Locations