Refining Blood Elixirs was a complicated process. A normal furnace couldn't hold enough much monster blood, so it required a spacious place. Before refinement, ditches had to be dug in a crossing pattern on the ground, with the furnace put in the center.
The ditches were like veins, while the furnace was like the heart.
All of the monster blood would be poured into the ditches and flow to the furnace. This was how the elixirs were refined.
There was enough space in the square, and what Jiang Chen had most of at that moment was time.
He used the Redcloud Sword as a shovel and started to dig in the square.
After the ditches, he made some changes to the cooking vessel he had previously used to cook monster meat.
Although a specific type of furnace would have the best effect and the highest success rate, what else could he do since he was trapped there?