Phantom

"You're quite sharp, kid, but it's too late for you." The old man said calmly. 

He put up a relaxed expression as he looked at Grey, this was a secret technique that he had used to win countless battles, there were even times when he would be on the verge of death, but once he uses this technique, he would be able to turn the tides of the battle and defeat his opponent. 

As long as that energy was inside Grey's body, it would continuously corrode Grey's essence, and the moment Grey get within a few meters of him, he would be able to even absorb the essence directly from Grey's body. 

While the old man wore a calm expression, he suddenly noticed that nothing was happening to Grey. All the things he expected to happen weren't happening. 

"Huh?" He looked at Grey weirdly. 

'One of the things these two dominant things in my body hates the most is intruders.' Grey thought to himself, not too worried about the foreign energy in his body.