"I only obey my master," Deathwing said emotionlessly. "My master commanded me to assist you in locating Yogg-Saron, not to help you show off."
"Rest assured, my scouts are scattered everywhere. We have found Yogg-Saron's burial site; it is sealed within a Titan relic—a temple called Ulduar. We will soon reach there and excavate Yogg-Saron," Ner'zhul said eagerly.
Having successfully excavated the heart of Y'Shaarj in Pandaria, and with the power of the Eye of C'Thun he had obtained earlier, his strength was now immensely powerful.
N'Zoth, that fool, thought it could control me, use me to seize the power of other Old Gods for itself, which is laughable.
Once Yogg-Saron is dealt with, N'Zoth will be next. When I gather the power of all five Old Gods, no one in this world will be able to stop me.
When Ner'zhul returned to the surface, Gul'dan immediately came to meet him.