In this Flame Realm, Tier Four is referred to as the "Combat Power Tier" for a reason.
On one hand, once one breaks through to Tier Four, the efficiency of Magic Power (Fighting Qi) output will naturally increase significantly, which greatly aids in the outburst of power during actual combat.
On the other hand, all the power honed during the foundational phase before Tier Four will gradually integrate and become "Whole Power" upon reaching Tier Four.
Just like the disassembled parts of a gun finally being assembled and loaded.
In the conventional understanding of the Flame Realm, only those who possess the ability to integrate their own power in such a manner are truly considered to have the initial qualification for battle!
