Chu Mu's White Nightmare Demon has already reached the peak monarch level of rank ten, as long as he gets a Spirit Item, Chu Mu has the opportunity to strengthen it to the Emperor Level.
Once he has three Emperors, Chu Mu's strength will become much stronger, at least he will have no problem facing a Level 1 Tribe alone.
Of course, right now, only the White Nightmare Demon can be strengthened to the Emperor Level as soon as it receives a spirit Item.
The White Nightmare Demon is a creature with sub-attributes; therefore, it requires roughly twice the resources to strengthen it with Spirit Items.
Soul pets with multiple attributes and those with single attributes have a clear disadvantage when it comes to strengthening their Combat Power Levels. For single attribute Soul Pets, Chu Mu just needs to find the corresponding attribute Emperor Spirit Item, directly strengthen it, and it can reach the Emperor Level with only the cost of one resource.