Ata when to retrieve Hachimaru in his Incarnate form which is only a fraction of his true power.
He split the moon with a normal sword (by the verses standard), a blade far inferior to their soul blade which can pierce at an atomic level.
The strike itself left cracks in the moon and a Giant crater where Ata collided with it. It also sent the moon hurdling toward the planet.
Pretty self explanitory.
Cut through the Chamber of Rebirth with is stated to withstand the collision of the Moon and the Planet via Chakara protection.
Separated the moon itself into two halves.
Which Feat is the most Impressive in your opinion?