What would happen if Kayn picked up AATROX?

I think over time, Kayn and Rhaast would develop a relationship of love & hate, the Darkins love to destroy and slaughter but Kayn is no different, he is as keen and ferocious as the Darkins, as Rhaast has noticed over the time, he took a liking to him but nevertheless that would drive him even more towards dominating Kayn as his Darkin instincts would want him to do so, to conquer and dominate.

As Kayn picks up the Aatrox sword, he falls unconscious while holding Aatrox on the left hand and Rhaast on the right hand, an inner realm inside Kayn opens up where the three meet, Aatrox looks at Rhaast and says ''You still can't beat this kid?! I'll do it for you!''.

Aatrox rushes in to fight Kayn, as they battle, Aatrox manages to tackle Kayn down and chokes to kill him Aatrox in his Darkin demonic voice says ''YOU'RE DONE KIDDO! HAHAHA!''

#Moments later

Rhaast stabs Aatrox heart from the back with his own hand Rhaast says to Aatrox shouting ''THIS IS MY BATTLE AATROX, HIS MINE TO KILL!''

As Kayn laid on the ground, tired & hurt from the battle, he saw Aatrox getting stabbed by Rhaast right before his eyes, moments later Kayn's eyes closed as his body could not move longer as the battle consumed all his energy. In the world outside of Kayn's realm, Kayn's body laid there unconscious, on his right hand, his finger moved, the next one too until moments later the hand started moving, they did not move from Kayn's will but Rhaast's will! Kayn's body woke up now controlled by Rhaast's will, Rhaast looks at Aatrox with Kayn's red glowing eyes and tightens his right hand and throws Aatrox flying far away!, meanwhile inside Kayn's realm of mind Rhaast looked at the tired Kayn and told him ''This isn't over yet kiddo! our battle was interrupted, I await for a TRUE BATTLE!'' Rhaast had shown what looked to be mercy was actually thirst for real battle between the two, so he waited until Kayn fully recovered..