This one needed to be separate because holy shit.
As Shadowheart's body falls, Osiris turns to the one person who has been by his side since the beginning. Cyril found him long before this plan was even in place. He had been given the task by Cyric to rid the world again of the dead three. When he was met with a new kind of Bhaalspawn, he chose to give Osiris a chance. He had personally witnessed the last Bhaalspawn crisis, so he knew that Bhaal was the one in control here, and that Osiris had a chance of beating his urges.
The last place he expected was to wind up right here, standing next to his two lovers, and being forced to die.
As a bonus here's the most depressing thing I have ever created
Shout-out to my spouse @galedickarios ( main account @bongbubbles ) for making Cyril and working his story to be so perfectly intertwined with Osiris'