What is sasuke curse mark tattoo?

Sasuke's curse mark tattoo is a symbol of his affiliation with Orochimaru, a rogue ninja who Sasuke turned to in order to gain more power to avenge his clan. The curse mark is placed on Sasuke's neck, and when activated, it spreads across his body, granting him immense strength and speed at the cost of his sanity. The curse mark is a seal that allows Orochimaru to control Sasuke's body, and its effects are enhanced when Sasuke experiences strong negative emotions. Over time, Sasuke learns to control the curse mark and uses its power to his advantage, but it remains a reminder of his dark past and the dangerous path he once walked.