Manipulating Space

The Space Elementalist didn't think too much about Klaus' antics and attacked as soon as the man in charge of the platform gave the go-ahead for the battle. 

Klaus felt a strong repulsive force from the place he was standing, and before he knew it, the space exploded out with a powerful force that forced him back. 

Luckily, he was already prepared for these types of attacks and retreated before the attack was able to send him flying. 

Although the space element was powerful in its own right, it was more effective when used with another element. As long as an Elementalist is frequent with the space element, the only way he could be defeated by a Space Elementalist is when said Space Elementalist has unbelievable control over the space element, or is well above their opponent in terms of cultivation stage. 

Klaus was already prepared for the space elemental attacks, so he made precautions.