Eric, Gale, and Salvador felt pumped up after hearing Vincent's words. At first, they didn't know how long they would need to train to master the ingredients purifying process. Now, however, they knew how long they had to undergo this grueling training to conquer the purifying process and make their instructor work. Thus, even though the training was too hard, they didn't feel downcast.
In the next few days, they trained and exhausted their bodies at night, followed by practicing discharging energy from their fingertips by using hand signs in the morning. To Vincent's surprise, Eric Ambrose was the first one to understand the path his mana took to escape out of his fingers and learned to shoot it out by using only his energy circuit.