Happy had already experienced Flame Wolf's binding technique!
Flame Wolf, Golden Rakkhasa, and Bloody Hell Saber appeared once more in the Chinese server, and beside them were the two women he met in Five Venoms' headquarters. This already caused Happy to be incredibly cautious.
And these two had even shown masterful Sword Control Art. When their longswords left their hands, they could use only their will to control their longswords. This naturally caused Happy to be wary of them, and there was no way he would be easily controlled by Flame Wolf once more. The attack speed in Sword Control Art was astonishing, and with Flame Wolf's strange ability in controlling others, it was absolutely possible for them to instantly injure any top-class elite they wanted.
Hence, when he saw the black flames that suddenly rose from Flame Wolf, Happy abruptly stopped rushing forward.