Alm and Bruno were confident in this test initially. They and Langrum were the only survivors of the entrance test, so the elders had no information about their true power.
In this place where no one could use Qi, normal cultivators became completely useless. But, of course, evil cultivators naturally weren't defenseless, as they possessed a strong body due to the large amount of death energy they had accumulated.
Blood was the place where all the energy of life circulated, along with a small amount of Qi. This life energy was nothing more than a mixed amount of Yin and Yang laws, the quantity of each varying according to race, gender, and individual. After death, this energy was converted into pure Death Yin caused by the resentment and lack of will of the deceased.