You all returned to the capital of REnais, which was now in ruins due to the war. 

Orson has been assigned to guard the castle, and what makes it worse, is that he's switched sides. 

(Y/N): So, that traitor Orson is here. 

Ruby: That jerk is going to really get it! 

Eirika: Brother. 

Ephraim: Orson... In retrospect, I realize he's been acting odd for a while now. He seemed so...dispirited.

Seth: His wife passed away six months back. The loss may have been too much for his mind to bear. His love and devotion to his wife were well-known among the knights.

Seth: And now he sits alone in the king's former bedchamber. He makes no effort to govern. No one is allowed to enter the chambers, and he takes no meals.

Blake: Seriously?! 

Yang: What is he doing? 

Seth: I do not know. The spies had to insight into his behavior. He does nothing to deal with the dark creatures and bandits roaming the land. Reports say all of Renais is engulfed in chaos. Region after region is revolting, and Orson's reign is already crumbling. Left alone, it may very well collapse under the weight of its own neglect.

Ephraim: We cannot allow the situation to reach that point. We're going home Eirika. We're going to the castle.

Myrrh then appeared. 

Myrrh: Uh ... please let me fight! 

(Y/N): Myrrh, are you sure you want to- 

Myrrh: Yes, now that Selena returned my Dragonstone, I can do what I can until its power runs out! 

In the bed chamber... 

Orson: What is it, Monica? You seem so happy today. Of COURSE I know what today is. I'd never forget your birthday! I have a present for you, dear. I think you'll like it...

Lyon: Orson.

Orson: ......

Lyon: Do you still recognize me, Orson, or are you entirely lost to this world? Yes, it's me, Prince Lyon. I'm the one to whom you are indebted for resurrecting your beloved wife.

Orson: ...Get out. This is Monica and my place. I will not have our home disturbed by anyone. I did as you asked. I betrayed Renais. My promise has been kept.Lyon: Yes, and I'm very grateful to you. I came by today to offer you a piece of advice. Nothing more. Ephraim is coming, Orson. He's on his way here to steal the happiness you two share.

Orson: Prince Ephraim?

Lyon: That's right, Orson. And he's angry. I don't think he'll forgive you for betraying Renais. You've done so much to free your wife from the grave. It's a shame she'll die with you.

Orson: No! That can't happen--

Lyon: That's all I have to say to you. What you do now is up to you.

Orson: ...Monica, I'm sorry. I have something I must do. Please wait for me here. Oh, darling, don't look so sad. I'll be back soon, and then I'll never leave. I must do this to protect our happiness. You understand that, don't you? All right then. I'll be back.

Orson then got his weapons ready and charged out. 

The majority of the party battled against Orson's forces, with Seth going to challenge him! 

Orson: Seth? So you've come. 

Seth: Orson. 

Orson: You're an impressive knight, Seth. You would sacrifice your life for king and country. Not even a moment's pause. It's a pitiful, unrewarding life, through and through.

Seth: It is my duty, my hope. Prepare yourself, Sir Orson. 

Seth and Orson attacked each other, with Seth going on the defensive, and looking for an opening. 

He analyzed his opponent's moves over and over until he noticed that he wasn't focused around the front part of his body! 

Seth: I'm so sorry Sir Orson. 

He slashed him right across the body. 

Orson: M-Monica. 

Soon...

Seth lead you, Eirika, Ephraim, and Team RWBY into Orson's chamber. 

Monica: Darling. 

Ruby: This is Orson's wife? 

(Y/N): No. There's something off. 

Ephraim: This magic ... it's the same one that was used to control Emperor Vigarde. She's already dead and her corpse was used to ... 

Blake: Who would do something like this? 

Monica: Darling ... Darling ... Darling ... 

Seth: .You can't say this thing is truly alive anymore. I'll...

Ephraim: No... I'll do it. ...The two of them spent every day in here, did they? Orson was mad. But I think he was happy...

(Y/N): How sad. 

Outside of the castle... 

Citizens: Prince Ephraim! Princess Eirika! The king has returned! Our king! Glory to Renais! Long live King Ephraim!

Ephraim: ......

Seth: ...They're not cheering for you. They cheer because Orson's misrule is at an end. They cheer the possibility of a better tomorrow, not the deeds we did today. But how will the hearts of the people move tomorrow and the next day? That is for you to decide.

Ephraim: I will not let their hopes and dreams be shattered again. I will be king. Like my father before me, I will dedicate myself to their happiness.

Eirika: And I will do all I can to help, Ephraim.

Weiss: Hey, it looks like the King left a note behind. It says, "Raise the twins' bracelets in the hall of kings. The seal will be broken. The resting place of the Sacred Stones will be revealed..." 

Eirika: So, we're supposed to raise our bracelets over our heads? 

Ephraim: Let's try it! 

Eirika: I'm ready! 

The two do so, and a secret passage appeared! 

Ephraim: This is the Stone of Renais...

Eirika: Yes. This is one of the five stones that defeated the Demon King.

Ephraim: If Lyon had acquired our bracelets, the stone would have been destroyed by now. Together, we protected the only power that can help us stop Lyon's insanity.

Eirika: Yes. It's the only hope left to us. Hope for you and me, and the last true hope for peace...

Ephraim: Let's get back, Eirika.

Eirika: ...Huh? Brother, look! Our bracelets, they're...Ephraim: What is this? Are they reacting to the light of the stone?

Eirika: I can't believe the bracelets contain so much power...

Ephraim: I wonder if Father anticipated all of this long ago. When I was growing up, I never thought about becoming king. I only wanted to be a good soldier, a good warrior. The best on the battlefield. Father never understood what I wanted, but... I never understood him, either.

Eirika: ......

Ephraim: It was the same when Grado invaded Renais. I should have stayed home to defend the kingdom... Instead, I raced off to fight for personal glory.

Eirika: Brother... I don't think you know how well Father understood your feelings. When I last saw him, he was concerned for nothing but our safety...

Seth: Eirika is correct. King Fado asked after your exploits every day. He also told me what a fine king you would one day make.

Ephraim: Father...

Seth: Now Prince Ephraim, Princess Eirika. Please follow me. The Sacred Twins of Renais should be near the stone's reliquary.

They then found two weapons. 

A fiery lance called Siegmund and a thunder blade called Sieglinde! 

Ephraim: These are the ancient weapons of our forefathers--the weapons of heroes. They were enshrined generations ago, to be used only by the king... I don't know if this is a burden I'm capable of bearing... but I do know that this is no time to curse my fate. I will fight. For my father, for my country, and for my people.

Ephraim took Siegmund and Eirika took Sieglinde!

Our heroes had received power-ups indeed!