Alex placed all 8 of the Immortal beasts' cores inside the formation, letting it absorb life aura for as much as it could.
In the meanwhile, he spent his time cultivating and preparing. The Immortal beast cores would take a long time to absorb the life aura.
Alex let them be for months, focusing on another thing he needed to fix before he could use them.
The technique to form the Blood Beast was somewhat flawed, which he had noticed from the start but could not have done anything to change at the time.
Now that he had the time, he had focused on it.
The Blood aura assaulted the beast core, making it submit to its power before letting it feed on it to form the Beast core. However, after noticing how Sunhearts did it, letting the beast openly accept it all, he had decided to use that approach.
