The process of brewing blood ink was not actually complicated. What was complicated was purifying the quality of the blood ink and increasing the final yield after vaporization and energy stabilization. Those two stages alone might involve more than a hundred subdivided steps, and the better they were done, the more steps there would be.
However, Angel did not need to care about excessively high quality. Low-grade blood ink could barely suffice; it merely left less room for error when inscribing magic patterns. As for increasing production, he cared even less. He was not making money off blood ink, so it made no difference whether there was more or less, as long as there was enough to repair the magic patterns.
Once he ignored the two most cumbersome stages of brewing blood ink, Angel's refining speed became extraordinarily fast.
Two hours later, the laboratory had become shrouded in clouds and mist from the brewing of blood ink.
Gurgle, gurgle—
A great volume of steam surged from the small chimney atop the magic energy decomposition machine. The steam carried a strong fishy stench, showing that Angel had not put much effort into removing impurities. At the same time, the phantom of a fire eel cloaked in lava faintly appeared within the steam, indicating that he had not achieved perfection in energy stabilization either, allowing some extraordinary properties to escape.
Even so, thick, murky liquid still dripped steadily from the decomposition machine's spout—the "faucet." This liquid was the heart's blood ink of the Fin-Tailed Fire Eel.
Angel took out a standard glass laboratory bottle and filled a bottle inscribed with permanent magic patterns with the blood ink.
In the end, he filled two large bottles.
To a magic pattern warlock, refining two bottles of blood ink from the heart of a single