Ye Xiwen seemed to hear someone roaring furiously behind the teleportation gate, but he did not care. At a time like this, even the slightest discrepancy could cost one's life. Who had the time to care about what backing lay behind them?
After killing Zhan Yan, Ye Xiwen did not leave immediately. Instead, he continued refining the Demon Summoning Banner. Though the time was short and it was impossible to complete the refinement, once it reached a certain stage, he would be able to activate some of its functions.
His earlier refinement had also allowed him to understand where these demons had come from. They had actually been formed from the demonic aura within the Demon Summoning Banner, and these demons had not appeared out of thin air either—they had all been renowned Demon Race experts from ancient times.
The Demon Summoning Banner possessed boundless power, but there was another legend concerning it. Back when a supreme Demon Race expert had forged the Demon Summoning Banner, he had refined a wisp of the Primordial Spirit of countless Demon Race experts into it, using them to command the endless Demon Race. Beneath this Demon Summoning Banner, those Demon Race experts dared not refuse his summons and could only be driven by him. Otherwise, they would die miserable deaths.
That was why the Demon Race had been able to establish the Ancient Heavenly Court and dominate an entire age. The strength of the entire Demon Race had been gathered together, sweeping through everything in its path. With all hearts united above and below, they were naturally invincible.
Later, many magical artifacts had been forged in imitation of the Demon Summoning Banner. The Demon Summoning Banner in Ye Xiwen's hands was one such example. Yet compared with the Demon Summoning Banner forged by