For Amber, this is Never Land, Mermaid Lagoon and for the Emerald side of the deck it's De Vil Manor, Cruella's Estate
Emblems cant be removed by normal means, so even if Sephiroth is defeated, the emblem sticks around, pinging your opponents for the rest of the game
You'll do a lot of interesting and powerful things with this deck - but it won't turn into a win against a more focused strategy
They may be able to singlehandedly move the power of a deck a couple tiers higher in the meta reports than they would otherwise
And, if a current character is threatening the field, you can keep your cards readied so they can't be challenged and protected, thanks to her Ward ability
I Summon You Here to My Game Final Fantasy might end up being not just the highest-selling Magic set of all time, but also the most popular