However, even so, Su Jie discovered through the comparison of blood absorption that these cold-chain stored blood samples had lost 30% of their potency compared with freshly refined human blood.
This was not due to a problem with the storage process but to the natural loss of blood essence within the blood, an unavoidable occurrence.
Moreover, Su Jie noticed that compared to the blood of the Tianyuan World, the blood from Blue Star was far inferior.
Su Jie conjectured that this was because humans in the Tianyuan World had been living in an environment filled with Spiritual Power from birth, which made their blood subtly different from that of Blue Star.
To verify his guess, Su Jie also used other prisoners of war from Japan for a series of tests on the Blood Sea Devouring Sky Demon Skill.
Only after all the tests were completed and Su Jie had confirmed his conjectures did he finally begin formal cultivation.
"Rise!"
