Measure of Wickedness + Ghoulcaller's Bell

End of Turn, my opponent controls Measure of Wickedness, MoW trigger goes on the stack to sacrifice and lose 8 life. In response to the trigger I activate Ghoulcaller's Bell, which causes another trigger for me to gain control of Measure of Wickedness. According to oracle text my opponent still loses 8 life and I gain control of MoW.

As far as I understand it, the Bell's effect happens simultaneously so I will gain control of Measure of Wickedness (because I milled a card at the same time as my opponent, so I didn't have control of Measure of Wickedness to trigger the second ability) and it will not immediately go back to my opponent's control.

Just making sure, this is a weird interaction, and I think I have it correct. However, if Ghoulcaller's Bell can be timed to gain control, give it back, and still have my opponent lose 8 life it would be a really fun combo.