Because there were only at most two battles left, Xiao Ji and the others decided not to hold back any longer. Considering that the Round Moon Forest Domain had already been exposed, using it again might not achieve the element of surprise. Thus, at Xiao Ji's request, Feng Yuan replaced it with the Underworld Domain Crystal Stone.
Compared to the Round Moon Forest Domain, the Underworld Domain could only cover Xiao Ji. Of course, it also provided some enhancement for Cotton's Death Series ultimate moves, but the enhancement was limited.
However, unlike a long-term state boost, the Underworld Domain could perform a Domain Awakening, unleashing incredibly powerful forces in a short period.
Feng Yuan had no doubts about their opponent's strength. If a war of attrition ensued, they would certainly be the ones to fail in the end.
For this reason, Feng Yuan agreed to Xiao Ji's request to switch the Domain Crystal.
