In a dark castle in a area infested with grim is a woman who is powerful and old who noticed the signature of multiverse energy and instantly contacted an ally of hers in another universe
???: ah I see you are recovering 'king of quirks'
'king of quirks': spare me the words 'queen of grim' I don't think this is a normal call is it
'queen of grim': correct I have sensed something leave my world and a portal open I'm just calling to ask you to be carful I will see who it is by who's missing and give you a list excluding the ones my pets eat of course
'king of quirks': good idea I look for people who came out of nowhere to see what I'm dealing with thank you
In a clock tower in Vale Remnant
Summer: please Ozpin I need your help to find Y/N
Ozpin: I'm not sure if I can Summer in all honesty but do you know why he disappeared
Summer: of course I know why but how come you can't find him you have recourses everywhere across Remnant
Ozpin: I felt a wave of energy that is commonly know as multiverse energy and can only be accessed by specific people and only a few others can detect it so I think he is within the multiverse but if I have sensed it then she probably did as well
Summer: Salem
Ozpin: yes and if she can gain access it she could make alliances across worlds which I don't want to think about
Summer: but what if she has I know I should be focused on my son but I also need to think about Ruby whilst Yang is being disciplined by Raven
Ozpin is confused about why Raven of all people be disciplining someone till curiosity got the better of the man and he asked
Ozpin: why did Raven come back and discipline Yang
Summer looked down to the ground as tears started forming in her eyes as she looked Ozpin in the his oak brown eyes and said something he never expected
Summer: it's because she and Tai abused Y/N to the point of running away and from what qrow said throw a portal
Ozpin didn't know what to say as Tai a man who he would have said is one of the kindest men he ever knew turned into a monster
Summer: but what's worse is that I didn't know about it till he ran away but I know Tai got everything set up but I don't know where he is now as we were focused on Yang he slipped away and if I ever see him again I'll kill him and the same is with qrow
Ozpin understands the motion and sends that Tai is wanted to General Ironwood as well as a way to detect multiverse energy but the only way they could properly detect it is with Y/N's blood. He sent an amount and they built a scanner for that type of energy.
In a underground hospital building in Mustafa, Japan, Earth
'king of quirks': doctor thank you for helping me after my fight with All Might
Doctor: no problem master but I must say are you sure about Shigaraki to become the next symbol of evil
'king of quirks': quite his heritage should break All Might. Now to find someone who 'came out of nowhere'
Doctor: sir I have a match
'king of quirks': oh please do go on
Doctor: well there is a Y/N Midoriya and he has absolutely no background
'king of quirks': *that's weird I could have sworn I only had one useless son* do you have anything on him
Doctor: yes his quirk is portals and he seams to have a healing factor with a F/C taint around his body with silver eyes and H/C hair with red tips in it
'king of quirks': *no way a silver eyed worrier she will be extremely happy that a threat to her grim has gone but to here*
he instantly sends a message describing Y/N Midoriya and when he got a message back it was dripping in happiness as he continues recovery.
In an undisclosed hospital
A man whose stomach was recently destroyed in a recent fight with a man only know as all for one.
???: All Might listen to me you need to recover if you don't you wont be anywhere near as strong as you were
All might: Nighteye if I'm not out there then who will be
Nighteye: listen to me there is another place within your future a place I can't explain with an immortal enemy who is more dangerous than all for one and if you don't take your time to recover so many people will die
All Might thinks upon those words for a bit of time before he sees it in All Might's future an anomaly and he says that they need to meet Y/N Midoriya and he will have some insight about the other world. After a few weeks when All Might is allowed visitors he and Sir Nighteye thought it would be best to invite Y/N so they can learn more about that world.
Nighteye: so Y/N do you know why we have called you here today
Y/N: to a degree you want to know about the multiverse
Nighteye: well yes but actually no we want to learn about a specific world
Y/N: let me guess my home world Remnant
Nighteye: yes ... what your home world?
Y/N: yes I left because of abuse now what do you want know
All Might: is there any threats that could be dangerous if they are here
Y/N: Grim they are by far the biggest threat that there is in that world because they are monsters that are soulless and eat people and there is many diffrent types with each at the size of an adult male but most are bigger, but there is dust that can be used as a like artificial elements but they are lightning, air, water, fire and gravity but you can combined the dust to get diffrent types
All Might: that is a very big threat and I'm glad I'm prepared for it
you are confused by this comment but shrug it of
Nighteye: the reason he said that is because there is an event five or six years into the future where this world and Remnant has casual communication but don't worry about it there seems to be something more important on your mind anyway you can leave
Y/N: thank you and could you sing this for me it's for my brother he's a huge fan
In a camp in the woods, Remnant
Raven was teaching her daughter how to act like family and introducing a concept of what go's around comes around by putting her through training that is close to the line of being to much to Raven which is way past the line for most people even endeavor.
Raven: this is what you were doing to you brother that is disgusting you will train to one day be a proper sister and till that day you will not see Ruby
Raven said those harsh words whilst Yang was training on a perfect replicate of Tai or as he's know now by the family 'that man'.
Yang was cursing herself for what she has done and will do everything she can if she see's her brother again to be the sister she should've been rather than the sister she was. But history has a funny way of coming back to haunt people doesn't it.
In a Dark castle, Remnant
A blond man is seen bowing down in front of the 'queen of grim'
Blond: I wish to join you Salem my life has been destroyed by a useless thing called a 'son' and I wish to destroy him
Salem: welcome to our side Taiyang Xiao long