Of course, others had tried to defeat this Boss before.
Previously, Lu Li had fought it while he had a bounty on him. There had been many Imperial Secret Service players and people from other guilds who were after his bounty. As such, the Boss under the whirlpool no longer remained a secret.
Some Druids had transformed into seals and attempted to enter. Those who could endure the ferocity of the whirlpool were thrown into the cave.
However, none of them could open the stone door, so they quickly gave up.
As such, Illidan’s Shadow became Lu Li’s private Boss. Unless other players received quests from NPCs and were sent here directly, this Boss would only be accessible by him.