The Invite Event added in Punishing Gray Raven Eternal Engine lets players earn up to 300 Black Cards by having their codes redeemed. To do so, players whose Commandant level is 40 or above can send their invite code to other players for them to redeem.

However, many players are unable to get the extra Black Cards because of the following restrictions:

• The player who redeems the code must not have logged in the past 15 days or more
• The player who redeems the code must be level 20 or above

That said, this guide will teach you how to overcome these restrictions so you can earn get the extra 300 Black Cards for yourself! Note that the method below will take up quite a bit of your time, so it’s up to you to decide if the 300 Black Cards is worth the effort.

Also, you will need to perform the following steps before October 18, 6:59 am UTC. You will not be able to earn the Black Cards if you did the steps after that time as you’ll need 15 days or more.

Step 1

Create 3 dummy email addresses and bind them in Punishing Gray Raven. Note: they must be on the same server as the account that you plan to earn 300 Black Cards with.

You’ll need to level the 3 dummy accounts to level 20. It is recommended not to clear the story as the dialogue takes time. Instead, just keep repeating resource missions. If you run out of Serum, simply buy more with Black Cards (these are dummy accounts anyway). The process should take less than an hour per account.

Step 2

Wait 15 days or more. Do not log into the dummy accounts within this period.

Step 3

Log into your 3 dummy accounts. On the Welcome Back screen, key in your invite code from your main account to redeem the rewards. Do this for all 3 accounts to get 300 Black Cards.

On top of the Black Cards, you’ll also be able to make 3 extra pulls from the Babylonia Supply Station web event. Rewards range from Construct tickets all the way to Apple Airpods.

Note: For those using browser on PC, you might need to zoom out (Ctrl + minus) to see the whole web event.

We hoped that the 300 extra Black Cards and other rewards you redeemed with the codes would be useful for your Punishing Gray Raven journey.

For more Punishing Gray Raven content, check out our:

• Eternal Engine guide
• Babel Tower guide
• Progression guide