After reaching Commander Level 11, you'll have access to Ultra Cores and begin seeing Ultra Core prices on offers (along with a non-Ultra Core price). To acquire an item using Ultra Cores, tap the Ultra Core price button on the offer. If obtained from the Web Store, your item(s) will be immediately delivered via Inbox. If obtained in-game, your items will be claimed automatically.
How do I Use Ultra Cores?
Last Updated: 603d