After running for a full half hour, Ling Feng had no idea how far he had gone. The scenery on both sides of his face gradually began to look unfamiliar.

Ling Feng then reminded Black Panther

"Black Panther, it's almost time, let's go back!"

"Woof!"

Black Panther slammed on the brakes and reluctantly began his return to base.

Ling Feng stood on the black panther's back, his mind racing as he pondered the changes the panther had just undergone.

The experiment just now successfully proved that my blood has a powerful ability to modify blood! It is in no way inferior to that of serum.

He planned to go back and draw more blood for the soldiers, but his blood was too potent and needed to be diluted, otherwise it might burst his body.

The two quickly returned to the front of the villa, and the black panther also turned back into its shrunken form, following Ling Feng back to the villa.

After returning to the villa, Ling Feng couldn't wait to prepare for the bloodletting.

This time, he took out a large bowl, placed it on the table, and then slashed his wrist hard with a dagger.

In order to draw out more blood, he cut the wound very deep this time.

Instantly, blood gushed from the wound and flowed into the bowl below.

As the blood in the bowl slowly increased, Ling Feng's face turned slightly pale!

Even with his formidable strength, losing so much blood was taking its toll!

He quickly took out an inner core and swallowed it!

The feeling of weakness in my body slowly disappeared, and as the wounds healed, the entire bowl was filled with blood.

Ling Feng stored the blood in his spatial storage and immediately upgraded it a hundredfold!