Fang Yuan shook his head, sighing.
The price of feeding wisdom Gu was too high. Only Lang Ya land spirit was willing to pay it.
Fang Yuan used sovereign immortal fetus Gu to revive, his age was about sixteen now. Humans in this world lived a hundred years on average, that meant that Fang Yuan had about eighty-four years of lifespan left, it was a long time.
But even so, Fang Yuan knew that if he obtained lifespan Gu, he would use them all on himself. Even if he did not use them, he would save them for the future in case of emergencies.
Lifespan Gu were mortal Gu.
But lifespan Gu were among the strongest forms of currency in Gu Immortal transactions, almost nothing could compare.
There were two obstacles in a Gu Immortal's cultivation, one was calamities and tribulations, the other was lifespan.
Even if one was as strong as an Immortal Venerable or Demon Venerable, they would still be challenged by these two problems.