Aatrox looked at the wound he received during the battle and released a self-deprecating laugh. Training for thousands of years earned him an immense arsenal of numerous different skills, but none of these skills were useful to a mere Baron cultivator. If Aatrox dared to activate the Darkin arm for a fraction of a second, having his arm crippled was the last of his worries.
The Darkin body, the result of countless wars, blood, experience, sweat and tears from enemies, was the perfect combat weapon. With a regeneration that made the God of time jealous, Aatrox knew that without that body his path to cultivation would be more difficult.
But that body was his, so the same way Aatrox is managing to use Darkin's eyes for a few seconds, at some point, when his power is stronger, keeping Darkin's body activated indefinitely again will not be a mere illusion.
Okay guys, I think you got a little angry for seeing Aatrox having some difficulty, that you forgot he didn't want to kill Robert, he just wanted to have a nice fight in the last chapter. ^^
Please, vote with your power stones ♥