A True Biological Generator, Zero Fuel Consumption

Yu Yuan frowned slightly as he looked over the materials required to make the [Spiritual Enhancement Potion].

The other ingredients were manageable. He already had the [Zero Virus Carrier Blood Sample] and all five kinds of [Acidic Blood] from Elite Infected.

He was still missing one kind of [Alkaline Blood] from a Boss-Level Infected, but he had plenty of Spiritual Organs.

The only real obstacle was [Spirituality Essence]. He had once obtained some by accident inside a Ritual Circle.

He had used 5 ml while optimizing the [Curio Workshop], leaving him with no more than about 2 ml.

That meant he needed at least another 3 ml.

And [Spirituality Essence] was produced through a Sacrifice Ritual, when Spirituality was infused into a sacrifice's cerebrospinal fluid.

According to Mona, one sacrifice yielded only 2 to 4 ml of [Spirituality Essence].

In other words, he needed another person's worth.

"Spirituality Essence!"

Yu Yuan looked at the Spirituality Crystal on his Positioning Watch.

Spirituality Essence is supposed to supply Spirituality. Could the Spirituality Crystal work instead?

Unfortunately, there was no response.

The Spirituality Crystal was clearly a more valuable item than Spirituality Essence anyway. Even if it could work, he did not want to waste it when he had a way to obtain Spirituality Essence.

"I'll ask Mona the next time I see her!"

Setting the question aside, Yu Yuan sorted through the Spiritual Organs, blood, and other samples he had collected, then placed them in the [Spiritual Creature Laboratory]'s dedicated sample Containment Area.

The empty laboratory immediately began to look the part.

He then entered the Biological Specimens pretreatment room.

The [Wow! Loser's Cube] appeared in Yu Yuan's hand. Five of its squares were already lit.

Five [Speedsters], bound up like parcels, were confined inside.

Yu Yuan picked one at random and