Following the conclusion of the battles in Galbadia Garden, your next mission is to travel back to Edea’s House in order to delve more into the story of Matron.
You’ll regain control of Squall in the infirmary after he checks in on Rinoa. Head up to the bridge of Balamb Garden and take control of the ship.
You won’t have far to fly. In fact, Edea’s House should be visible in the distance (as shown in the screenshot below). Exit the ship and walk into the small white structure in front of the lighthouse.
Enter the main building and grab the 
Timber Maniacs magazine sitting on the ground when you first enter.
There is a fair bit of dialogue that takes place at the orphanage explaining how Edea had been possessed. There isn’t much to do in this area other than carry the story forward, but there is one last card that you should obtain before you leave.
Triple Triad: Edea CardThe Edea Card is a one-of-a-kind rare card. Unfortunately it is one of the most painful cards to try and obtain due to the ruleset in place on Centra.
Centra makes use of both the Random rule and the Same/Plus rule, both of which can make it exceedingly difficult to win a game against her and get any of the cards you need. Here are some general steps you can follow to make things easier. Complete them in this order:
1) Clean out all of your lower level cards. Any card that is Level 6 or lower you should use 
Card Mod on to get it out of your inventory and to remove it from potentially being chosen as one of the cards that you need to play with against Edea. You’re still going to get a random assortment of cards, but at least there’s a higher likelihood of Boss Cards, GF Cards and Player Cards.
2) Spend some time learning how the Same/Plus rule works by reviewing the Triple Triad section of the site. There will still be an element of randomness to this, because you can’t see what cards Edea is going to play and covering off on all of the various combinations can be a real challenge, but this can help you prevent yourself from setting up Edea for an easy win.
3) Re-enter Edea’s House and talk to her until she stops asking you whether you want to spread any of Balamb’s rules to Centra. Do this step now before you save so that if you have to reset you won’t have to power through all of these dialogue windows multiple times.
4) Finally, try and try again. Reset the game as many times as you need to until you get lucky. You may potentially lose another rare card to Edea but don’t give up (unless you lose a third card, then just reset and try again).
This can take a lot of trial and error and requires quite a bit of persistence. You can play her again later if you’re having trouble stealing her card from her, but don’t give up!
Also, you can use this opportunity to obtain the Seifer Card from Headmaster Cid if you missed challenging him to a game earlier.
Exit Edea’s House back out to the world map and jump back into Balamb Garden.
Once you are back inside the Garden, make your way down to the Training Center. Take the pathway leading off to the left when you reach the fork in the road and look for Weapons Monthly, July Issue, sitting on the ground.
Now head over to the Infirmary to visit Rinoa. After a bit of internal dialogue from Squall, its time for another Laguna Dream Sequence…
