Hao knew this was a mistake done by his pro team before, and so he warned his current team about it. As for why, he left the experience of dealing with the boss to speak about that.
"This boss will attack once we get fifty metres close to it," Hao said in warning, "scatter up, and always leave enough space for you and the other players around to jump at when needed."
*Roar!*
Just as he said this, the boss roared. Hao was the first to trespass this fifty metres area, and so he was the one to get targeted by that boss attack.
"Watch out!" Cher shouted in warning while she was ready to use her Heal skill.
"No need," Hao didn't move in such a way without a purpose. He wanted to show them how this boss would attack, and how they should react.
Just as the boss roared, its right claw was raised and pointed towards Hao's direction. The claw started to grow in a blue hue before a shot was launched from it.