Doesn't That Mean He Can One-shot Me?

Grey bowed slightly to greet the Elder and said, "Please." 

The Elder nodded and attacked. He was a Water Elementalist, so multiple tentacles made from the water element appeared around him as he attacked. 

Grey was calm, seeing one of the tentacles coming his way, a fireball collided with it, turning it into mist. Another tentacle shot through the mist at breakneck speed, aiming straight for Grey's chest. 

The speed of the attack took Grey by surprise, but he was also prepared for something like this. The tentacle pierced through Grey's figure, and the eyes of the geniuses present widened, even a few Elders were taken aback at how easily it was for the Elder's attack to hit Grey. But then they started to notice that something was wrong. There were no visible signs of pain in Grey's facial expression, and they noticed the Elder who attacked entered a defensive stance the moment the tentacle pierced through Grey. 

Boom!