Joke Collection Website - Mood Talk - How many stones does the Royal Sword Fairy Edge need to rise from the sixth order to the seventh order?

How many stones does the Royal Sword Fairy Edge need to rise from the sixth order to the seventh order?

It takes 380 to upgrade from order 6 to order 7.

Upgrading from 5 to 6 probably requires 270 advanced Dan; Upgrading from 6 to 7 probably requires 380 advanced Dan; Upgrading from 7 to 8 probably requires 520 advanced Dan; Upgrading from 8 to 9 probably requires 790 advanced Dan; Upgrading from 9th order to 10 order probably requires 1400 advanced Dan.