Zhou Wen chatted with Tsukuyomi for a while and gained a deeper understanding of the dangers of the universe.
Apart from being food for other Calamity creatures, there was the constant danger of Essence Energy expenditure. One needed to constantly replenish their Essence Energy to maintain their combat strength.
If one expended too much energy, it wouldn't only be a problem of a decline in combat strength. One might even starve to death.
Apart from hunting other Calamity creatures, one could also obtain Essence Energy from dimensional zones on different planets. There was also an important source of Essence Energy—Companion Beasts born on those planets.
Only then did Zhou Wen understand that Calamity creatures like Tsukuyomi and The Fallen wanted the Venusian Companion Beast to increase their strength, but also use it as food.