Back in February, Final Fantasy sold out on Amazon in a matter of a few days, and remains sold out at the moment of writing
This said, both cards are currently banned in Legacy, and they are both brokenly powerful on their face, so my guess would be that they were simply too good for Standard, rather than being part of a specific oppressive combo
7 Three Tree City Creature Mana Generation Is Valid This land card looks like it would work well as a green mana land, but, it's able to provide its scaling mana for any color
After that, we begin to move beyond Commander in terms of legality
The Paladin is absolutely the better card due to the absurd metalcraft ability, but both should be in virtually all your equipment EDH decks
Even rats hoard their treasures