Upon hearing Lu Chen's words, Yun Yudie asked perplexed, "A strong presence that can emit such pressure, isn't it an Immortal Emperor?"
Lu Chen replied, "That previous aura was somewhat reminiscent of the aura from extraterrestrial beings."
Lu Chen had refined the residual soul of Fen Xiao, an extraterrestrial being, and had accessed some of Fen Xiao's memories, hence his familiarity with their aura.
The aura contained the power of extraterrestrial beings, so it's likely that it's the pressure from them.
The thought of the other party being extraterrestrial, and possibly seeing them as a foe, made Lu Chen's expression turn exceptionally solemn.
If it truly is an extraterrestrial being that has escaped, then he might be in trouble. He increasingly feels that he's the one who sealed them and created the Tianyan Immortal Domain.
