Longzun's boundless killing intent

Following the profound and obscure syllables, circles of water-like light patterns spread out in the air. The Water dragon's eyes flickered, and its whole body became crystal clear, like an ice sculpture, but it also exuded an extremely violent and uneasy aura.

"Don't go up yet. This guy's comprehension of the Dragon language isn't good enough. I'm afraid he can't completely control the divine dragon's soul." Wu Xie reminded Ling Chuxi and the rest.

As soon as he finished speaking, the Ice Dragon raised its head and roared. It swung its head and slammed Teng Jiao to the ground.

"BOOM!" Teng Jiao wasn't prepared at all. His head and feet were ruthlessly dug into the sand. He pawed with his hands and feet repeatedly before pulling his head out. When he looked at the Ice Dragon again, his face was full of fear.

This Divine dragon's soul was summoned by him using the Dragon language, so it should have listened to his orders, but why did it attack him?