Itachi and Deidara locked eyes on one another. Seeing Itachi's Sharingan activated angered Deidara as he grabbed a handful of clay and formed two gangly figures with puppet like strings coming from the mouths on his hands.

Deidara: Prepare to be humiliated by my art!

Itachi: Let's get this over with.

Deidara: Don't take me lightly Aizawa!

Deidara then sent the two clay figures to attack Itachi, but he easily takes them down. Deidara then detonates them, but Itachi dodges the explosion. The UA students watch in awe.

Tetsutetsu: Deidara's going all out!

Monoma: Hopefully Deidara can actually beat him this time.

Kirishima: Don't underestimate Itachi! That guy's a genius!

Monoma: Typical of  1-A to think highly of themselves.

Kisame: If we were talking about anyone else, you might've had a point. But since we're talking about Itachi, it's very much true.

Tetsutetsu: Pretty bold talk!

Kisame: If his matches at the Sports Festival didn't convince you, then perhaps this sparring match will.

As Itachi and Deidara fought, Yaoyorozu and Kendo watched the two fight with concern and worry. Back at the fight, Deidara summons a giant clay bird and gets on it.

Deidara: No where to run now Aizawa!

Deidara then charges at Itachi, but he uses Amaterasu to ignite the clay bird in black flames.

Deidara: This is bad! Hhm.

Itachi: What are you going to do now?

In a desperate measure, Deidara split the clay bird to avoid the Amaterasu flames. He sends the bird covered in flames to Itachi.

Deidara: Ha!

Deidara then detonates the bird which covers part of the forest in black flames. Itachi used Susanoo to protect himself from the explosion, but deactivated it to avoid overusing his Sharingan.

Deidara: Not bad. But let's up the stakes! Hhm!

Deidara then charges at Itachi, but he jumps on the bird. Itachi then charges at Deidara. As the two trade blows, Aizawa and D observe with watchful eyes.

D: I feel your concern for Itachi.

Aizawa: Itachi can handle himself.

D: But the worry is still the same.

Aizawa was caught off guard by D's words because he was right. Despite Itachi's skill, Aizawa still felt worried for his son considering Deidara's skill with his Quirk along with his temper. Itachi and Deidara fought a hard fight on the bird.

Deidara: Time to end this!

As Deidara prepared to detonate the bird, Itachi stopped him by punching him off the bird. As Deidara falls to the ground, he detonates the bird. The explosion threw him to the ground. When they both fell to ground, they were both exhausted from their fight. Deidara locked eyes on Itachi.

Deidara: It's..... it's over. I win!

Itachi remained silent.

Deidara: Come on aren't you scared even a little? I'm about to defeat you with my art!

Itachi remained silent. Deidara then remembered his humiliating defeat at the hands of Itachi. He laughs. But his laughter Soo turned to rage.

Deidara: THAT'S WHAT ANNOYS ME ABOUT YOU THE MOST! YOU THINK YOU'RE JUST SO COOL!

Deidara looked at Itachi's Sharingan and his rage grew.

Deidara: Those eyes.....those overconfident eyes make me sick! Always judging me and my art! You have absolutely no respect for my art! I can tell that you don't!  I'll never forgive those damn eyes that just mock my art! 

As Deidara spoke his mind, the students watching were stunned by his words. Kendo however understood his frustration.

Itachi: None of that matters now Deidara. This match is over.

Deidara was stunned. He then begins laughing. As he does Itachi retracts his Sharingan. Deidara quickly notices this.

Deidara: You've retracted your Sharingan? Is that how little your fear me? Well I'll give you a reason to fear and respect my art!

Deidara then pulls out a lump of clay and feeds it to his hand. He forms a clay dragon and gets on it.

Deidara: I'll show you my art! This will be my magnum opus! The scar it will leave on this Earth shall be a monument to my art and to your defeat! 

Itachi then summoned his Susanoo. He couldn't form a full Susanoo due to his exhaustion from the fight. He was only able to form a rib cage and an arm. Kendo and Yaoyorozu see the danger and attempt to intervene as the two charge at each other.

Yaoyorozu/Kendo: ITACHI/DEIDARA! STOP!

Deidara: GET OUT OF THE WAY KENDO! 

Itachi: (Damn it! I can't stop!)

Both Itachi and Deidara were unable to stop themselves as Yaoyorozu and Kendo ran in between the two to stop them. But before the damage could be done, Aizawa and Vlad King stopped them. Aizawa used his Erasure Quirk to cancel Itachi's Quirk while Vlad King used his Blood Control Quirk to restrain Deidara. The clay dragon flies into the sky as Deidara is forced to detonate it, creating a large explosion.

Deidara: Stay out of this! This is between me and Aizawa!

Vlad King: Were you trying to kill Itachi? You could've hurt Kendo!

Deidara: She shouldn't have gotten in the way!

Vlad released his control on Deidara as he stormed off. But not before glaring at Itachi. He formed a clay bird and flew away. 

Kendo: Deidara! Wait!

She took off after him. Yaoyorozu then ran to Itachi.

Yaoyorozu: Itachi! Are you okay?

Itachi was lost in thought as he watched Kendo going after Deidara. He saw the destruction caused by their fight. Mandalay then gathered the other students while D went after Deidara and Kendo.