Chu Sheng looked at the remaining 170-plus million Life Essence and had to temporarily abandon the idea of upgrading the Golden Silkworm King Gu.
"System, upgrade all the Spirit-Devouring Worms first."
[Ding! All Spirit-Devouring Worms have been upgraded to Eighth-Grade.]
[Ding! All Spirit-Devouring Worms have been upgraded to Ninth Grade.]
[Ding! Upgrade failed. Unable to continue upgrading the Spirit-Devouring Worms.]
'What's going on?'
Chu Sheng was stunned for a moment, thinking he had run out of Life Essence.
But a closer look revealed he still had over 150 million Life Essence, which was more than enough!
"System, why did the upgrade fail?"
[Spirit-Devouring Worms are a eusocial species. There is an upper limit to the colony's level progression. A King Realm Spirit-Devouring Mother Worm is required as the colony's core to continue upgrading their level.]
'Eusocial?'
