This is likely because Final Fantasy III introduced something new to the chocobo forests: Fat Chocobo
Players can enjoy the iconic strategies afforded by black Commander cards in an all-new, immersive play format right away
These include valuable reprints and the occasional Universes Beyond crossover, almost always with new art
Scouting Trek has great synergy with our Simic Elf Tribal and can lead to many Lands ETB (and Landfall triggers) and thus ramp us far ahead in mana production
Sagas Even if removing the fact that sagas are now 'deciduous' mechanics, they still fit the theme well enough that they are bound to become an important part of this set
Tannuk, Steadfast Second Although the artifact text looks like flavor text, some things like Portal to Phyrexia and Coveted Jewel play remarkably well with it, alongside the usual types of big creatures that do things threats, which stick around in the exile zone to be hardcast later, if need be