Yang Feng nodded slightly.
Bone Underworld Emperor held an Underworld Emperor Scepter and silently recited an incantation. Countless spell seals emerged and sank into the scepter.
The Underworld Emperor Scepter suddenly blossomed with countless mysterious spell seals, transforming into a bone ship engraved with innumerable profound spell seals that descended into the Underworld Source Sea.
The moment Yang Feng boarded the bone ship, countless mysterious spell seals flickered in his eyes as he peered into the ship's spell seals, his aura constantly changing.
A trace of shock flashed through Bone Underworld Emperor's eyes. "He is actually comprehending the construction of this underworld ship. Terrifying! Eternal Edge is truly terrifying!"
Bone Underworld Emperor could only rely on the memories imprinted within his soul and the authority of the underworld to transform a bone ship capable of crossing the Underworld Source Sea. He himself could not understand the principles behind this spell.
Yet Yang Feng was actually analyzing the structure of that bone ship. Once he deciphered it, he would be able to cast the same spell with ease. This was also where human warlocks were formidable.
"Eternal Edge is truly terrifying!"
Soul Underworld Emperor and Corpse Underworld Emperor, the two great underworld emperors, exchanged a glance, and shock likewise flashed in the depths of their eyes.
Along the way, Soul Underworld Emperor and Corpse Underworld Emperor both cast spells, each summoning an underworld ship that carried them to a small island.
"Master, this is Underworld Source Central Island, one of the core Holy Lands of our underworld race."
The instant they set foot on Underworld Source Central Island, Bone Underworld Emperor immediately introduced it to Yang Feng.
Yang Feng looked around and saw Underworld Trees growing across Underworld Source Central Island, each shrouded in dense underworld aura.
Upon those Underworld Trees