In Castlevania: Dawn of Sorrow, Julius Belmont comes to the reflection of Dracula's castle along with Genya Arikado and Yoko Belnades in order to stop Celia Fortner, the leader of a shadow cult, from reviving the Dark Lord. Soma's first encounter with Julius is at The Lost Village, as Julius and Yoko are standing at the edge of a chasm. Julius encourages Soma to leave the castle, due to the fact that he may succumb to his dark nature. Soma refuses, and Julius accepts his determination. He then makes a massive leap across the chasm and continues down the bridge on the other side.
Old Friends Reunited (At the drawbridge of castle’s entrance)
Soma Cruz: Huh? Those two...
(Soma approaches Yoko and Julius) Yoko Belnades: Oh! Soma! Julius Belmont: ... Soma Cruz: Yoko. Julius. What are you two doing here? Yoko Belnades: Funny you should ask that. We got wind of this cult from a tip by Arikado. I'm investigating with Mr. Belmont. I'm sure you remember him, the hunter. Julius Belmont: Soma, please understand. If the darkness draws you in... I have no choice but to destroy you. Soma Cruz: Yes, I know... Julius Belmont: Then, there is no reason for you to be here. Yoko Belnades: That's right. You're only putting yourself in danger. Soma Cruz: That Celia woman... Not only was she after me, she tried to harm Mina, too. I'm not gonna stop until I find her. Julius Belmont: You're determined, I see. Then, I have nothing more to say.
(Julius leaves) Yoko Belnades: Wait. Wait, Julius. How can you just say that? Julius Belmont: I'll be going now. Yoko Belnades: Wait a second. I'm coming, too. Julius Belmont: No, Yoko, you stay. We'll need a contact here, just in case. Yoko Belnades: Hey, wait! You can't just...!
(Julius jumps over the suspended bridge and leaves) Yoko Belnades: Men! They're so selfish! I bet you have no intention of going home, either. Soma Cruz: Well, uh... Yoko Belnades: Fine, then. Here, take this.
(Yoko hands Soma the Magic Seal 1) Soma Cruz: And this is? Yoko Belnades: A Magic Seal. Soma Cruz: Magic Seal? Yoko Belnades: The cult leader appears to create gates that draw the power of darkness. Monsters exposed to that power are said to be invincible. Soma Cruz: So how am I supposed to destroy them? Yoko Belnades: That's where this Magic Seal comes in. Want to practice using it? Soma Cruz: Sure, I'll give it a try. Yoko Belnades: Good. Now watch closely. Draw a figure exactly as shown.
(The Magic Seal is shown to Soma) Yoko Belnades: Okay, now you try it.
(The Magic Seal is completed) Yoko Belnades: Good, that's it. Just don't forget how you did that. Oh, one more thing. You can practice drawing a Magic Seal anytime. If you're not sure how to do it, you should definitely practice. Soma Cruz: Got it. Yoko Belnades: A Magic Seal activates on its own when it's needed. Give it a try and see. Okay, now... Let's go, Soma. Soma Cruz: Huh? Go where? Yoko Belnades: It's a dead end here. Only Julius could get in from somewhere like this. We should go back and find a different way in. Soma Cruz: All right. If we have to... Yoko Belnades: There's no shelter from the rain and wind here, either. Will you escort me? Soma Cruz: Uh... Sure, of course. Yoko Belnades: Thanks. Let's go.
The Sealed Floor (In a room below the Condemned Tower)
Julius Belmont: ... Soma Cruz: Julius. What are you doing? Julius Belmont: Huh? Oh, it's you. This door is sealed by a powerful barrier. Something's behind it, too. Soma Cruz: Do you sense something bad? Julius Belmont: Yes. I can feel it in my gut, and it doesn't feel good. Unfortunately, it's impossible to check what's behind the door. Soma Cruz: Why is that? Julius Belmont: The barrier's too strong. I may be able to crack it, but just a bit. It'd be better to contact Yoko and await help. What about you? Soma Cruz: Well... (I described what I had discovered to Julius.)
Julius Belmont: The dark lord's candidates. It sounds as if that should be my next target. I will see about joining Arikado.
Fourth Encounter with Celia (Celia suddenly appears in front of Soma)
Soma Cruz: ?! Celia Fortner: You've only come this far? You seem to be taking this rather leisurely. Soma Cruz: What are you trying to say? Celia Fortner: Dario has grown stronger by fusing with the demon of fire I summoned for him.
(Arikado appears) Genya Arikado: I see. Is that your plan? Julius Belmont: Soma, back off.
(Julius appears in rush as well) Soma Cruz: Arikado! Julius, too! Celia Fortner: Your presence is without meaning. No one can stop Dario now. The emergence of the new lord of darkness is all but certain now.
(Celia vanishes before their eyes) Genya Arikado: Julius! I'm sensing a surge of magical power coming from the river. It must be Dario. You go after him. I'll track down Celia.
(Arikado leaves) Julius Belmont: Soma, from here on, you stay away and let us take care of it.
A Battle Between Julius and Dario (Julius is on his knees after a battle with Dario)
Julius Belmont: Ungh! Soma Cruz: Julius!
(Soma approaches Julius) Julius Belmont: I'm fine. Don't worry. Dario Bossi: What? You done already? So much for the "legendary" Belmont! Julius Belmont: Hmph. Talk all you want... Dario Bossi: Hey, punk! Looks like I can get me a little payback from ya! But I'm not at full power just yet... The throne chamber on the top floor--you were headin' there, weren't ya? That's where we'll settle scores once and for all.
(Dario vanishes before their eyes) Julius Belmont: Watch it. He's tough. Especially for me, since I can't use Magic Seals. Soma Cruz: Hold on, Julius. You can't use Magic Seals? Julius Belmont: Uh-huh. What about it? Soma Cruz: Well, didn't you run into monsters that you couldn't destroy? Julius Belmont: No, I destroyed them before they could reconstitute. They weren't a problem. But this time, I don't think that'll work. Soma Cruz: (You've got to be joking. That should've been impossible.) Julius Belmont: Forget about me. You can go on. I'll be fine. Soma Cruz: He's expecting me. I'll be on my way. Julius Belmont: Watch out for his fire attacks. But you can do it. Don't disappoint me.
Julius Belmont: So... Soma has become the dark lord. I have no other choice... The battles of the past are to be waged once again... Genya Arikado: I had assumed that he would have equipped the talisman from Mina... It would have protected him. But alas, I will have to unleash my power...
(Julius and Arikado enters the village's entrance)
The Problem of Aging (In a room below the Condemned Tower)
Julius Belmont: Break this barrier? It's definitely possible. But there's no guarantee that I'll have energy left to fight. Genya Arikado: Without your power, it's impossible for us to get through. They have to be stopped, at all costs. Julius Belmont: ... Well, I suppose this is an emergency... Fine. Stand back.
(Arikado stands back) Julius Belmont: Here goes.
(Julius unleashes the Grand Cross and breaks the barrier) Julius Belmont: YEAAAAAAH!!
(Julius is on his knees, weakened from performing such powerful feat) Julius Belmont: Ungh... The barrier... It's gone. Genya Arikado: I'm sorry... Julius Belmont: Go already! There's no time for chitchat. Genya Arikado: Right.
(Arikado enters) Julius Belmont: Soma? Growing old is a horrible thing. Soma Cruz: Just relax. Don't worry. We'll take it from here. Julius Belmont: All right. I'm counting on you. Don't let me down, kid.
Good Ending (Soma and Arikado watch the castle crumbling down)
Genya Arikado: It's finally over. We're finished here. Let's go. Soma Cruz: ... Genya Arikado: Soma, what's wrong? Soma Cruz: Tell me. Just what is the dark lord? Genya Arikado: What Celia told you wasn't necessarily wrong. The dark lord is the entity opposite to god. Soma Cruz: Then that means there will always be a need for a dark lord. All because I ducked out from becoming the next in line! Genya Arikado: Don't misconstrue me! Perhaps there is a need for the dark lord... But there is no reason at all for you to become the dark lord. Soma Cruz: But if it weren't for me, none of this would have happened! Genya Arikado: You're neither a god nor a demon. You're only human. You have no chance at ever achieving perfection. Or are you saying you want to be the dark lord? Soma Cruz: No... Of course not. Genya Arikado: Then stay true to that. Look.
(Yoko, Julius, and Hammer is shown not far from them) Genya Arikado: There are people waiting for you. Don't break their hearts. Soma Cruz: Everyone... Julius Belmont: You kept your promise. Yoko Belnades: Welcome back, Soma. Hammer: Looks like you're all done! Your face says it all. Soma Cruz: Arikado... You're right...
(Mina arrives) Soma Cruz: Mina! What are you doing here?
(Soma rushes toward Mina) Mina Hakuba: What do you mean? I was so worried... Soma Cruz: Oh, Mina, I'm sorry. Don't cry. Mina Hakuba: Gotcha! Welcome back, Soma. Julius Belmont: Poor Soma. She'll have you wrapped around her finger. Yoko Belnades: Oh, without a doubt. Hammer: I'd like to be wrapped around Yoko's finger... Soma Cruz: Wh-What are you saying? We're not like that!
(Yoko, Julius, and Hammer laugh) Mina Hakuba: Th-That's right! Julius Belmont: No need to be bashful, you two. Genya Arikado: If the world needs a dark lord, it will emerge. Even if it's not you, Soma...
Yoko Belnades: Julius! How rude of you to just run off without saying a word to me! Julius Belmont: Sorry, but this is my duty. I belong to the Belmont clan, after all. Yoko Belnades: Well, isn't that rather insulting? We Belnades have fought alongside the Belmonts to defeat Dracula. Julius Belmont: That's true, but... Yoko Belnades: You don't have to bear the grief alone. People support each other. I wish you would at least trust me a little more. Julius Belmont: You're right. I'm sorry. I do have faith in you.
Julius Belmont: Arikado? Or should it be Alucard? Alucard: That doesn't matter. I had to transform to draw out my full power. Julius Belmont: He's grown so powerful that you have to go that far? Alucard: Yes. Failure isn't an option. I need your help.
Julius Belmont: That's why I came. You have my trust.
In Castlevania: Dawn of Sorrow, Julius Mode is unlocked if the player does not equip Mina's Talisman when Celia slays a fake Mina in the Garden of Madness. This causes Soma to succumb to his dark nature and he becomes the new Dark Lord. It will also unlock if the player does wear Mina's Talisman and proceeds to earn the "best" ending. This mode can be selected at the start menu, and the player starts the game as Julius. He is armed with the Belmont heirloom whip, as well as a variety of sub-weapons, which include an Axe, a Holy Water assault that goes along the ground, a Cross Boomerang, and a devastating, multi-hit attack known as Grand Cross.
But unlike Julius Mode in Castlevania: Aria of Sorrow, that version has its own storyline, continuing on after the bad ending, in which Julius aims to keep his promise to Soma to kill him if his dark power ever overcomes him. Also unlike the previous game, Julius can level up and increase his power. Furthermore, he can find two other characters that join his party :
In order to promote team mechanics in Dawn of Sorrow, Julius loses the High Jump ability to Alucard, replacing it with a regular aerial uppercut attack that the player can use as a third jump, and his Omnia Vanitas from Castlevania: Aria of Sorrow is also replaced for the traditional slide move.