A mysterious person helps

"Demon Lord Sky-Slayer...you will definitely regret this!" Blood Rakshasa looked at the other party and spoke.
"If you kill us... Ling Shuai will definitely kill everyone in your Shitian Palace..."
"Haha, your Ling Shuai, if he dares to come to the Dark Domain again next time, this will be his burial place!" The Sky-Slaying Demon Lord sneered.
"You're an idiot!"white Tiger said in a deep voice, "The person who can kill Big Brother in the Dark Realm has not been born yet, so just wait!"
"Really?"...