In Naruto, there are many types of cursed seal techniques used by various ninjas like Kakashi and Minato. The Cursed Seal of Heaven is among the few robust seals that can grant its users many powers like increased Chakra and enhanced physical capabilities. Sasuke finds his long-desired power in the Cursed Seal of Heaven.
The curse mark on Sasuke’s neck represents the cursed seal of Heaven. He received the mark in Naruto episode 30, titled “The Sharingan Revived: Dragon-Flame Jutsu!” The cursed seal of Heaven means that the user has received a portion of Orochimaru’s chakra and soul that can provide them with significantly increased powers.

Orochimaru disguises himself as Shiroe, a ninja from Kusagakure Village, and infiltrates the forest of death during Chunin Exams. He battles with Sasuke, and upon spotting the perfect opportunity, he extends his snake-like head and bites Sasuke’s neck. This leaves him with the cursed seal of Heaven.
Orochimaru needed Sasuke’s body, so he decided to take advantage of his thirst for power and give him the seal.
Sasuke first used the power of this cursed seal in episode 33, titled “Battle Formation: Ino–Shika–Chō!!” of Naruto.
Upon activating the seal, curse marks appeared on his entire body, providing him with increased chakra and strength. He dragged the ninjas from the Sound Village through hell with this power. Sasuke begins to use this curse seal’s power more often from this point onward.
In the Naruto series, Sasuke and Anko (Jonin Sensei) are the only ninjas who have the cursed seal of Heaven engraved on their bodies. Even though Orochimaru has countless subordinates, he only used this technique on them, which is quite interesting.
What did Kakashi do to Sasuke’s curse mark?
Kakashi knew that this curse seal could become a potential danger to Sasuke’s life because he had witnessed Anko suffer. Orochimaru tested this seal on various experimental subjects, but they all died; only Anko was fortunate enough to survive.
Kakashi took responsibility to suppress the effects of the cursed seal of Heaven by using the Evil Sealing Method in episode 39, titled “Bushy Brow’s Jealousy: Lions Barrage Unleashed!” This sealing technique will last as long as Sasuke doesn’t wish to use the cursed seal anymore.
It is important to note that Kakashi made several preparations to initiate the Evil Sealing Method, which indicates that this process is quite challenging to handle. Moreover, the Evil Sealing Method cannot remove the cursed seal; it can only suppress its effects and spread.
What level is Sasuke’s Curse Mark?

The cursed seal of Heaven has two levels. At the first level, the curse mark envelops half of the body with fire-like markings. Moreover, it grants the user a fair amount of chakra and enhanced physical abilities.
On the other hand, the second level of the cursed mark is entirely different as it alters the user’s body, transforming them into a monster. The user gains a significantly increased amount of chakra after activating the second level of this seal. However, the risk of dying also increases.
The user is most likely to die if they abuse the powers offered by the cursed seal of Heaven. It wasn’t a gift in the first place but a deadly mark that only leads to death and despair.
Despite knowing the outcome of using the cursed seal, Sasuke decided to advance the cursed seal level because he wasn’t satisfied with the power gains from the first level. He unlocked level 2 of the cursed seal of Heaven during his fight with Naruto in episode 134, titled “The End of Tears” of Naruto.
Sasuke and Naruto engage in a deadly battle. He tries to stop Sasuke from going to Orochimaru, while Sasuke is determined to do anything to gain power.
After unlocking level 2 of the cursed seal of Heaven, Sasuke’s body undergoes significant changes such as his complexion turning dark gray and his hair growing dark blue.

His eyes had darkened as well. He also sprouted webbed-claw-shaped wings on his back alongside a star-shaped mark across the bridge of his nose.
Does Sasuke’s curse mark go away?
The cursed seal of Heaven is a taboo technique created by Orochimaru. Moreover, it is pretty challenging to remove the seal. It is actually impossible to remove this curse mark with standard techniques. Sasuke’s curse mark can only go away when Orochimaru dies or gets sealed away.
Sasuke fights with Itachi in Naruto: Shippūden’s episode 138, titled “The End.” During the last moments of their battle, Sasuke releases the absorbed chakra of Orochimaru through his cursed seal. Itachi takes this chance to successfully remove Sasuke’s curse mark by sealing Orochimaru with the Totsuka blade.
Later, we see that Itachi wanted to get the hiding Orochimaru out of Sasuke’s cursed seal because the cursed seal and Orochimaru will always pose a danger to Sasuke’s life.
Since Itachi removed Sasuke’s curse mark, Sasuke isn’t seen with it in the Boruto series. However, this doesn’t affect his powers much since he has managed to maximize his abilities anyway.
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Is Sasuke stronger with the curse mark?
There is no doubt that the cursed seal of Heaven can provide the user with immense chakra and abilities. However, it feeds on the user’s will. The curse mark is like a cheat that can boost your powers for the time being. Sasuke succumbed to it because he wanted to get powerful overnight.
Sasuke is more powerful with the curse mark, but he could have gained the same power by training hard. He couldn’t use Senjutsu before acquiring the power of Six Paths. Still, the cursed seal enabled him to use Senjutsu, which is quite interesting.
The second level of the cursed seal helped Sasuke survive various life and death situations. In episode 134, titled “The End of Tears,” he fought on par with Naruto, who was fighting in the one-tail mode, which again shows that the cursed seal made Sasuke powerful.
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