Greg versus Viper
Viper glared at him, and saw a battlemage floating with his shoes raging with flames.
He looked at it and determined it was an artifact, which gave him the power to float even in the sky.
Furthermore, just like him, his body was surrounded with a thick concentration of mana, so as to not be affected by the air pressure and gravity.
Supposedly, only warlock and Archmage could fly in the sky, but with the existence of artifacts, a peak High-Rank Mage could do the same.
Only that, they could not remain in the sky indefinitely, compared to Warlock and Archmage.
Although, Viper was not using an artifact at all, but a level 2 spell, wind platform, which compressed an air, turning it to a solid platform where he could step and freely walk in the sky.
Viper scrutinized the man with a glare and recognized him.
After all, he did some research before assassinating Luke before, to which he failed.