"What's that?" The juniors were hearing about it for the first time so they were confused.
The problem was that the name sounded terrifying, as if it could kill anyone.
"Something from ancient times, now very rare," the old cultivator replied.
"Essentially, it can summon lightning throughout the universe to create the most terrifying attack, and can even kill an Immortal Ancestor."
"Kill an Immortal Ancestor?" That information made many people take a cold breath.
"Isn't that too dangerous?" the juniors asked again.
"Of course, it's not that easy to kill an Immortal Ancestor," the old cultivator replied. "It's true that the formation is extremely powerful, but it requires too many resources to activate. To kill an Immortal Ancestor, who knows if the resources of the entire Heaven Realm are even enough. So far, it's only ever been used to kill High Grade Immortal Emperors like the Ninth Stage or Eighth Stage."