It does something nothing else does
Final Fantasy games are so rich with flavor, beloved characters, and unique settings that choosing a single game as the theme provided more than enough material to design a full deck of cards around, says Senior Game Designer Daniel Holt, who is the Commander Lead for the set

(Since these cards are quite rare.) Below you'll find all of the cards you need for 'Wisdom of Sea and Sky Museum 3' secret mission: Chikorita #162 (Full Artwork / One Gold Star) Bellossom #163 (Full Artwork / One Gold Star) Cyndaquil #165 (Full Artwork / One Gold Star) Qwilfish #168 (Full Artwork / One Gold Star) Octillery #169 (Full Artwork / One Gold Star) Pichu #171 (Full Artwork / One Gold Star) Ampharos #172 (Full Artwork / One Gold Star) Xatu #174 (Full Artwork / One Gold Star) Wobbuffet #175 (Full Artwork / One Gold Star) Murkrow #178 (Full Artwork / One Gold Star) Scizor #180 (Full Artwork / One Gold Star) Smeargle #184 (Full Artwork / One Gold Star) Rewards: 36 Wonder Hourglasses, 12 Pack Hourglasses and 10 Shop Tickets
The Ruins lets you destroy a Construction to get back the resources you spent on it and draw two card, with the Ruins itself still clogging up the destroyed Construction's city slot
Before you do, mess around with your deck and make sure your Deck Level is equal to his
Best Sliver Enablers So you've loaded up lots of slivers, here are some of the best cards to make slivers work, Kindred Discovery because after a board wipe or two you need card draw to recover, Herald's Horn to reduce your costs and help you see more slivers, and Cavern of Souls to combat any counterspell action your opponents think can stop slivers