When Naruto sealed Kyubi no Youko, what seal tattoo appeared on him like Ootutuki Hagoromo?

This is the boundary of the blood inheritance of Naruto Vortex. The Vortex clan is a blood relative of the Thousand-Handed clan, which has a fairy body and a special huge chakra. Naruto's mother is a whirlpool team and his father is a thousand-handed team. Naruto inherited the bloodline of the Six Classics and had chakras of the same nature as the Six Classics. In addition, the Vortex team inherited six seals, so it is not surprising that Naruto will use six seals. Naruto's mother is proficient in seal and printing.

Naruto now owns chakra completely in Kyubi no Youko, which means that he can draw an equal amount of immortal chakra, and the immortal mode will last a long time, even an infinite immortal mode will appear.