Drawing the blood-energy cluster over from afar, Velin spoke again. "Again."
Hearing Velin's command, the four began circulating their Breathing Techniques once more, continuing to absorb the blood-energy cluster before them.
As blood energy flooded into their bodies, cracks began appearing across their skin again after they had circulated their Breathing Techniques three times.
Compared to the first time, their bodies' endurance had increased more than threefold.
Moving the blood-energy cluster away, Velin continued observing the changes within their bodies.
After fully circulating their Breathing Techniques fifteen times, the cracks on their skin vanished and their bodies returned to normal, but hidden injuries remained, which they could not heal on their own.
This round of training left the four only a thin sheet of paper away from Silver Intermediate.
Velin injected another strand of power into their bodies to heal their hidden injuries, then ordered, "Begin your breakthroughs."
Upon hearing this, the four did not hesitate in the slightest. They directly circulated their Breathing Techniques and began charging at that barrier.
In less than half an hour, all four became Silver Intermediate Swordsmen.
Seeing this, Velin drew the blood-energy cluster over again. "Continue."
Seven days later, one-third remained of the blood-energy cluster condensed from the flesh and blood of one High-rank Gold Demon, one Gold Intermediate Demon, three Gold Low-tier Demons, and sixty-four Silver Rank Demons. Yet the four had already reached High-rank Silver, only one threshold away from the Gold Tier.
The Gold Tier bottleneck could not be rushed, nor could shortcuts be taken. They needed to become familiar with their newly expanded power before attempting a breakthrough.
After mending the hidden injuries in their bodies once more, Velin waved a hand and helped them up. "You have rendered great service in this experiment. Is there anywhere you wish