https://youtu.be/dYiAJQx8XFA

Thanatos and ??? clashed blades, trading blows. They were evenly matched.



Thanatos launched a Cero directly at ???. However, ??? casted Hadō #1. Shō, forcing the cero back at Thanatos.

Thanatos brushed off the attack as he grabbed ??? by the head and started to drag him across the wall.



??? desperately attempted to break out of Thanatos' grasp. In retaliation, ??? casted Hadō #63. Raikōhō. Thanatos reluctantly dropped ??? and tried to stab Thanatos through the neck, however Thanatos hardened his skin with Hierro, to prevent the sword from piercing his neck.

Thanatos went for a counterattack by aiming for ???'s neck in return. ??? casted Bakudō #8. Seki to reflect the attack. Both Thanatos and ??? back away to gain some space.

Thanatos: Tricky bastard...

???: And you're stubborn...

(Y/N): Hey I hate to remind you guys that we're... Oh I don't know... ON A TIME LIMIT. WE DON'T HAVE TIME FOR A STUPID SQUABBLE! AIZEN'S GOING TO KILL EVERYONE AND TAKE OVER IF WE KEEP ACTING LIKE IDIOTS!

???: If I were to give you my full power now, in combination with Thanatos', you could have the power to go toe to toe with Aizen, but there's no telling if you'll simply take his place.

(Y/N): And what exactly does that mean?

Thanatos: There's no persuading him! Just force him to tell you.

Thanatos then charged a Gran Rey Cero and fired it at ???.

???: Useless.

??? Put out his hand and absorbed the attack with ease.

???: You can have this back.

??? released all the energy he just absorbed back at Thanatos.

Thanatos jumped to avoid the attack but ??? rushed him, landing a devastating slash to his shoulder. Thanatos grabbed onto ???'s arm to stop him from leaving and return the favor, slashing into ???'s shoulder.

Thanatos: How's that?!

???: You shouldn't have done that. You just made my job easier.

(End Song)

Thanatos: Huh?

https://youtu.be/K-tj_IzTJ2Y

??? grabbed onto Thanatos' other arm and they immediately started to fuse. Light shined brightly in the throne room. As the light faded, a single entity stood in the place of the two spirits.



(Tweak the design to fit how you'd image the fusion looking)

???: He's finally out of the way...

(Y/N): Wha-What... What happened?

???: Me and Thanatos are linked. You've been able to combine your shinigami and Hollow powers so it shouldn't be surprising. This is simply what happens when you decide to use us simultaneously.

??? signalled the arrancars released (Y/N).

(Y/N): Ankou- No, whoever you are... Please explain what's going on...

???: Ankou is just fine. I told you that was my name-

(Y/N): Why do you believe that I'd become such a horrible person if you told me your real name? I doubt my powers would be much different from what they are now. Why? Don't you trust me!?

??? doesn't say anything.

(Y/N): Your silence speaks a lot of words...

(Y/N) takes out his scythe as he points it at the mysterious figure.

(Y/N): I think you're the one who's been projecting his feelings onto someone else. I'll prove to you I'll always stay true to myself.

(End Song)

(Meanwhile) In the Fake Karakura Town.

The surrounding arrancars were observing(Y/N)'s body for about 15 minutes, and so far nothing happened.

Apacci: Is anything happening?

Sung-Sung: It's hard to say. He's been quiet for a while.

Starrk: Taking a nap sounds good right about now...

Lilynette: You fall asleep and I'll make sure you stay asleep, you got that?

Starrk: Yeah... I got it...

https://youtu.be/OGeDrQZCwcc

Just then, the six arrancars felt the floor starting to shake. They all turned to (Y/N) as his body started to transform to a Vasto Lorde.

Harribel: Be on guard everyone! We don't know if he's hostile or not, yet!

The newly transformed (Y/N) looked around for a second before he let out a loud roar.

Starrk: Lilynette.

Lilynette: On it.

Starrk absorbed Lilynette, activating his resurreccion.

Harribel: Apacci, Mila Rose, Sung-Sun. If things go south, you have permission to use Ayon.

Apacci: R-Really? He's just a Vasto Lorde...

Harribel: Starrk was willing to go all out from the start with resurreccion. That means (Y/N) is dangerous enough to take us all out if we don't take him seriously.

Mila Rose: Understood. However, if that's the case, wouldn't we risk killing (Y/N)? We can't even control Ayon.

Harribel: It's only a last resort. Don't be hasty.

Harribel activated her resurreccion and entered the fight.

(Y/N) immediately shot a cero out of his mouth, destroying anything in his path without remorse.



Starrk and Harribel dodge the attack as Harribel dived straight in and Starrk stayed back to shoot (Y/N).

Harribel delievered two swings of her sword at (Y/N)'s chest but (Y/N) shrugged it off and swung at her. Harribel dodge the attack, allowing Starrk to hit (Y/N) while he was wide open

Starrk: Cero Metralleta.



(Y/N) was pelted with multiple ceros. This aggravated (Y/N) as he made his way towards Starrk. Harribel jumped in front of Starrk and shot a La Gota at (Y/N). In response, (Y/N) simply punched it with enough force to destroy the technique.



Just then, Apacci jumped in, landing a drop kick directly at (Y/N)'s back.



(Y/N) recovered from the attack and grabbed Apacci by the leg, throwing her away.

Just then, Mila Rose and Sung-Sun charged a Cero and shot (Y/N). (Y/N) once again, brushed off the attack and flew directly at the two fraccion members.

Mila Rose hopped in front of Sung-Sun, headbutting (Y/N). Mila Rose snuck behind and grabbed him by the waist and suplexed him to the ground. As (Y/N) hit the ground, he broke out of Mila Rose's grapple. (Y/N) and Mila Rose then started to trade punches.



Unfortunately for Mila Rose, (Y/N) landed the first punch and proceeded to hit her hard enough to leave her airborne, where he proceeded to land a barrage of punches.



Sung-Sun tried to grapple (Y/N) by wrapping snakes around his body, but (Y/N) grabbed the snakes and pulled Sung-Sun towards him, preparing to hit her with a Lariat. Thankfully Apacci came to the rescue, catching Sung-Sun before she could get hit from (Y/N).

Mila Rose got up from the ground as she brushed herself off.

Mila Rose: He hits like a truck...

Apacci: I'll say...

Sung-Sun: What do we do now?

Harribel: Move out of the way!

Harribel warned her fraccion. Harribel's sword was glowing as she was aiming an attack at (Y/N). Apacci, Mila Rose and Sung-Sun quickly backed away as Harribel swung her blade.

Harribel: Trident.

Harribel's attack cleaved through (Y/N) with ease. (Y/N) was cut through diagonally, from his left shoulder down to his right leg. The attack cut (Y/N) in two as his upper half fell to the floor.

Harribel: Regroup! He'll regenerate from that attack at any moment!

The three fraccion members quickly flew to Harribel's side. Just as Harribel predicted, (Y/N)'s body started to regenerate, good as new. (Y/N) let out another roar as he started to charge an attack. (Y/N) started to produce a sword made out of spiritual energy. (Y/N) swung the sword and the sword shot out multiple cero's covering the area they were fighting on.



Everyone on the battlefield struggled to protect themselves from the attack. (Y/N) let out another howl. Just then.

La Gota

Cero Metralleta

Harribel and Starrk, who were still up from the previous attack, shot with their respective techniques.

As the smoke cleared, (Y/N) was shown with visible damage.

Starrk: At least we're doing damage to him...

Harribel: Between my Trident and your Cero Metralleta, We can damage him but his strength and endurance are a problem...

Starrk: The only good thing that came out of this is the fact that if the kid comes out of this with a resurreccion, we can safely say he could compete with Aizen...

Harribel: We just have to hope we can survive long enough to see it happen.

Just then, (Y/N) howled again, but this time he started to shrink in size, as his form changed, matching that of Thanatos and ???'s fusion.

Harribel: Is that-

Starrk: Maybe... but it doesn't look like he's in control...

The monster made no noise and walked towards the two Espadas...

Starrk: This is such a pain... For once I wished the Witch was here to help out.

Lilynette, from inside of Starrk's gun, spoke.

Lilynette: Less complaining, more shooting!

Starrk: Aye Aye Captain...

Harribel: We just need to buy time, that's all...

The two got in a battle stance, readying up for round 2.

To be continued.

Similar to how White and Zangetsu fused in Ichigo's inner world, ??? did the same, although he forced the fusion himself.