Perhaps you already know?

Damon immediately felt a wave of weakness as both skills drained his health quite a bit. The absence of mana in the surroundings cost him a lot. Then how was the old man able to freely use his skills?

"I assume you can now take care of any stray attacks on the plane?" Artimius smirked at him as his figure flew past him without any restriction. A long silver shimmering sword appeared in his hand as the old man dove straight towards the damned missile!

Damon narrowed his eyes and stared at the unbelievable scene. Though he was now able to use some skills in real life at the cost of his blood energy, he would never underestimate the power of modern weapons. Only a level 100 with complete access to mana might be able to stand against modern weapons in a head-on power collision. Even that was pushing it.