Ye Wudao flew out of the black dragon's massive jaws, took out the Kunlun Blood Covenant, and said, "Drip your essence blood on this Blood Covenant!"
"I didn't expect you to still be a disciple of Kunlun." The contempt in the black dragon's eyes faded as it said, "We had an agreement beforehand, right now our relationship is merely that of employer and employee. You may command me to kill, but you can't restrict my freedom!"
Ye Wudao nodded, "Agreed!"
The black dragon opened its huge mouth and slowly dripped a drop of purple essence blood onto the Blood Covenant.
Quickly, the Blood Covenant took effect!
"Pleased to cooperate!" Ye Wudao said with a smile.
"Hmph, who would've thought that I, in all my brilliance, would be defeated by a mere brat!" The black dragon looked at Ye Wudao and said, "The great one is called Heilong!"
Ye Wudao, holding the key in his hand, asked, "How should this key be used?"
"Insert the key into the keyhole of the Nine Turns Golden Thunder Tower!"
