Midgar, City of Mako Midgar, City of Mako is one of the stronger adventure lands, largely because Reactor Raid has such an efficient draw effect
A deck that combines the ramping magic of Sapphire with Emeralds dastardly trickier, players will also benefit from some pretty insane draw support thanks to the likes of the Floodborn Donald Duck, Sail the Azurite Sea, and Clarabelle, and especially the solid new Cinderella thats making waves in many Sapphire decks right now
The big problem is that Summon: Esper Maduin is only a 4/4, so not terribly difficult to deal with, and you had to invest six mana to get there
Low effort reaping high rewards
Each of those, like the Darkness Crystal, will reduce the mana required to cast a spell in its appropriate color by 1, and will cost four mana two of the color of choice, but the rest is unique to each Crystal