lucian and thresh buff idea

we know that Lucian's wife got taken by Thresh (link: https://www.youtube.com/watch?v=bgFD2ZNpfN8) (similar to Rengar and Kha,zix) so maybe if Lucian is level 9 (at least) and Thresh has at least 25 souls a quest pops up between Thresh and Lucian on separate teams. The quest is called Souls.

If Lucian kills Thresh, His wife grants him on a 3rd extra attack on his passive dealing 40%/50%/60%/70% depending on the ability level

If Thresh kills Lucian, He Gets Lucian soul, granting him double the buff from incoming souls and + 5 AP and + 2 Armor each soul each 10 souls

This buff can only happen once per game and thanks for looking at this! Special thanks to Summoners: Benneb10, alfavhunter