Y/n with his new apprentice Salem was outside using the Grimm as training dummies.

Y/n: " Your first training to become a great fighter is strength."

Salem: " Strength? Ha strength is for the weak."

Y/n then blast her with force lighting. Salem did yell with anger until she fell down.

Y/n: " You fool!!! Strength helps the sith but not hope!!! mercy is for the weak. Strength prevails!!!!"

Salem was angry so Y/n gave her a new weapon.

Y/n: " This Belongs to my old master. I was going to use it but instead I'm keeping the ones I have. This weapon is the symbol of the Sith. Use it as this will make your powerful."

Salem held it as she then press to ignite it only to see a red blade. She then cut the Grimm until she sees the power of the blade.

Salem: " This is interesting. Master I want to learn more."

Y/n: " Then training proceeds."

Y/n trains Salem using sith knowledge and power. She trains her good as she then commands a new army. Y/n trains her using the force and crushing some grimm.

Y/n then proceeds on a sith ritual for a vision so his plan will not interfere.

Y/n: " Salem my apprentice. The plan to take the world is coming. Now I need your hand."

Salem lends him her hand until Y/n cuts her and uses his force lighting. It was then later on he then sees the man who is Ozma with four students.

Ozpin: " Salem!! This is the end!!!"

Salem: " ..... I will kill you this time!!!"

Salem uses her lightsaber and charges him while the four came. Y/n got his lightsaber under his sleeves while he looks at them.

Y/n: " Your hope will die and the Sith shall live!!!"

Y/n slash the four teams while he slash the ground while being faster. Y/n deflects while Salem fights Ozpin. She slash him while Ozma deflects. It was then the girl with the silver eyes uses her power as Y/n blinds him and Salem. It was then in reality Y/n sees the future. Y/n with anger and fear to know the silver eyes are a threat to him. Seeing a vision would ruin his plans.

Salem: " Master are you ok?"

Y/n: " No!!! The silver eyes are a threat to my plans!!! We must lead your grimms and kill every silver eye!!!!"

Salem: " Don't underestimate them. There Huntsman and Huntress. They defend people against Grimm."

Y/n: " Then use their weakness. Kill every silver eye and then the plans proceed. Now I must think before it will be done."

Y/n left while Salem commands her grimm to make raids in some villages to attract huntsman and Huntress. Some time later Y/n discover who was in his vision. A woman who has red hair and silver eyes. Y/n took off his mask while telling salem to prepare for a trap. He then walks far way to Vale where he could find her. Sometime Y/n then notice a Grimm as Y/n pretend to help. It was then someone came as he sees her.

Y/n smiles under his hood until the woman wanted to know if he's ok.

Woman: " Sir are you ok?"

Y/n: " Yes but why are you here?"

Woman: " Ozpin wanted me to help those people so I did. It's quite are since I need to know who is responsible for this."

Y/n smiles until he say the truth.

Y/n: " I know who it is and her name is salem. If you wanted to finish this then come with me."

Woman: " Well I should get my team."

Y/n: " Hmmm maybe but it's a waste of team. She is weak trust me."

Woman: " Ok my name is Summer. What's yours?"

Y/n: " Well just a regular man. Plus I don't like someone knowing my name."

Summer walks with Y/n where he let her to where Salem was. About some hours Summer made it to the tower where Salem was. Y/n opens the door seeing salem sitting down.

Salem: " Well well well. So this one must be the one who was in my master's vision."

Summer: " Master?"

It was then lighting came as Summer Rose screams in pain. Y/n laughed while Summer widens her eyes to see her betrayal.

Y/n: " Foolish, young woman I never thought one of the best student of Ozpin would have defeat me and my apprentice."

Summer: " Your the one who case this!!!"

Y/n: " Not really. Salem was already like this way. I just trained her to show that the darkside is stronger."

Summer: " You will not get away with this!!! My team including Ozpin will defeat you!!!!!"

Y/n: " Yes they will but I had a vision of you. Now you shall die."

Y/n shocks her with his force lighting as he then strikes her. He was about to kill her but he knows she will be missing and sense someone powerful then Salem even him. He instead take her use her as a prisoner. Salem was a little confused of why he wanted to keep her alive.

Salem: " Master I thought you wanted to kill her?"

Y/n: " Yes I want too but I sense someone powerful and better. Later on you shall have a new apprentice and learn the darkside."

Salem: " Yes master."

Y/n trains Salem with anger and fury while using Summer to torture her. It was a little bit fun for Y/n as he waits until showing the full power of the darkside. In Beacon Ozpin wanted to know what happened to Summer Rose but he thinks she have died. The Rose family would be broken as Ruby wanted to know who her mother was.