This is the 3nd currency you wil be introduced to in the tavern. It is available from level 70 and beyond. You can obtain this currency from playing Golden Soul Janken. You can only gain access to these currency if you are VIP 1 at minimum ( or when you hit lvl 80 tavern).
These are the ninjas that you can recruit with this currency!
- Sage Kabuto
- Killer B
- Terumi Mei
- Kushimaru Kuriarare
- Jinin Akebino
You also require this soul when upgraded these ninjas
For more information about other types of souls, please look at Souls.