From Chapter 26 - Divine Eagleís Heavy Sword:
Slowly, he regained consciousness, not knowing how much time had passed.
Something incredibly bitter in his mouth immediately caught his
attention, while, some kind of bitter juice kept dripping down his
throat. He opened his eyes and saw the Divine Eagle placing a dark
purple ball shaped thing into his mouth. This thing stunk like a rotten
fish, but Yang Guo ate it anyway, thinking that since the Divine Eagle
was extremely intelligent, this thing in its mouth had to be something
good. With only a gentle bite, the skin of the ball shaped thing cracked
open and immediately his mouth was filled with bitter juice.
The juice was extremely bitter and smelly and it tasted awful. Yang Guo
really wanted to spit it all out, but he didnít want to go against the
Divine Eagleís good will and finally managed to swallow it. A few
moments later, he tried to slightly control his inner energy flow, and
to his surprise, he found his breathing smooth and fluent. He stood back
up, and again, not only did he not feel tired or exhausted, but instead,
he felt totally refreshed, no, it was even better than before.
Yang Guo was puzzled. Logically, when someone got knocked out with a
strong blow, even if the person was lucky enough to not get injured
seriously, he would at least feel soreness all over his body. Could that
dark purple ball shaped thing be some kind of magical cure?
He bent over and picked the heavy sword up. It felt as if the sword had
become slightly lighter than before.