Purchase at Lost Saga using a Rixty account:
Login to your Z8 Games Account
Select "Deposit" from the top menu
Select "Prepaid Card" under DEPOSIT, then select the Rixty radio button.
Choose the number of Z8 Points to purchase, and press the "BUY NOW" button.
Login to your Rixty account and complete the purchase. If you need to add funds, click a payment method and follow the prompts.