With the death of sirzechs only leaving Ozpin as the last headmasters on Yn list

Yn remembers that god of light and god of darkness are tired of ozpin reincarnations and Salem immortality as they contacted Yn and want Ozpin and Salem life to end to start with ozpin then end Salem life

Yn accepted the mission as Yn teleports to earth then head to union academy as Yn looks around having flashbacks meeting friends and...being bullied not being helped by the teachers

Yn arrives to the headmaster room as Yn sees Ozpin
Sitting in his chair

Ozpin:I knew you come after me last

Yn:the god brothers gave me a mission to killed you and that immortal witch Salem

Ozpin:she can't be killed

Yn:she can you just never understand jinn answer when you asked her

Ozpin:I wish I asked her correctly but it's to late now since your going to kill me

Yn:yes by the god brothers orders also payback for me you and your council of teachers ignored my request of help from my bullies now some of them are dead because me and I loved every last minute of it

Ozpin:for not helping you I apologize for my actions and to the others

Yn:I don't need your apology

Ozpin:I understand before you kill me please have a seat and have a drink with me

Yn:very well

[There should be a GIF or video here. Update the app now to see it.]

(Just the Sal Marcano part)

Yn takes a seat as Ozpin gets a bottle full of wine and pours two glass cups one for Yn and one for ozpin he gives one to Yn as they both drink the wine

Ozpin:this wine has hint of strawberry in it

Yn:taste good

Ozpin:throughout the years I've been reincarnated I've seen more death than any men women child has seen lost friends family children brothers sisters fathers mothers all I wanted was to stop Salem and end my reincarnation finally have peace also to apologize to her for what I made her she was my wife and had children but they were gone from me and Salem attack I lost my children now I want to see them

Yn:I may be sorry for losing your kids but it you won't be seeing them in heaven

Ozpin:I know the all the graves I put people in I won't be surprised that I'll be going to hell

Yn takes out his gun and aimed it at Ozpin

Yn:in here is a bullet that the god brothers made that you and Salem can finally die no more reincarnation or immortality

Ozpin:I'm ready

Yn:don't worry you'll meet your ex wife in hell when I visit her soon

Bang

Yn shot Ozpin in the head killing him then slide on the desk kicked Ozpin out of the headmaster office room as he falls towards the ground

Yn leaves union academy and heads back to stardust

The news of Ozpin death spread throughout the world as some teachers and trusted people know about his reincarnation they thought they were waiting for Ozpin to find a new host but I didn't happen now that Ozpin dead it's only a matter of time before Yn ordered to kill Salem next