C446 Knife mountain

The Descent of the Blood Sea was one of the Shen family's 18 Descending Spells. As the name implied, this Descending Spell was related to blood. Even its primer had to be fresh human blood.

Using the blood of the caster as a primer was not a rare feat, but what it required was almost 40% or more of the blood in a living person's body.

As long as a normal adult man's body was at a normal level