At this moment, Yu Qingcang's face was full of worry.
They had tried many times for the strategy of Black Dragon Mountain Range.
But every time they failed.
Moreover, there is a big problem in this, every time they attempt Black Dragon Mountain Range.
They need a large number of high combat professionals.
This has a significant impact on the overall strength of the union.
Every failed attempt results in a huge loss of high combat professionals.
At such a critical time, with the national war approaching.
If all the factions haven't successfully strategized Black Dragon Mountain Range, it wouldn't matter.
But now, with the U.S.A. claiming the first clear of Black Dragon Mountain Range, the other factions have no choice but to try.
Because as the highest-level team dungeon at this stage, the equipment produced from Black Dragon Mountain Range greatly affects a professional's combat ability.
With the national war approaching.
