In truth, with the abilities of this powerful being's Spirit Body from another realm, obtaining blood essence of the Profound Venerable level in the True Demon Realm was not particularly difficult. Directly killing several late-stage or peak Profound Venerables and devouring the pill infants within their bodies would have been easy as well.
But that blood essence and those pill infants were of little help to his main body. What he needed was the blood essence of powerful beings from other planes, or the special substances within their bones.
Those special things could exist only within the bodies of powerful beings unlike those of the True Demon Realm.
That was precisely why, when the power of the contract struck him back then, this powerful being from the True Demon Realm had signed the cross-realm contract without much hesitation.
The bone fragments and blood essence he obtained afterward had indeed allowed him to find what he needed within them. Although there had been very little, it was still better than nothing.
If the Laws of Heaven and Earth had not grown more powerful than in ancient times, making it impossible for him to cross the Plane Barriers between the two sides by his own strength, he would not have gone to such lengths to sign this kind of contract.
"Three drops of blood essence should count as satisfying the requirements this time. But next time, you must prepare five drops of blood essence of this level, or two skeletons of peak Profound Spirit beings."
Looking at the three jade bottles floating before him, the tall Spirit Body swept out his enormous hand and scooped them into his palm. After glancing at them, he swallowed them directly. Only after a moment did he speak in an indifferent tone.
"Since I have accepted