The only downside is that you need to keep a creature alive in addition to the Enchantment in order to maintain that banishment, but Sheltered by Ghosts more than makes up for this by giving the creature in question Ward 2, for a total package that does more than other cards for less mana
Barbarian Ring: As a proud Dwarf of the Magda Coalition, you'd be surprised at how often I reach Threshold even when I'm playing a Mono-Red deck in a cEDH environment
As a final note, I dont know anything about the Final Fantasy games myself, and I wont evaluate these cards based on how well they adapt characters, so I wont comment on the flavor at all
Once the cultivator Colossus is played, its controller can put a land from their hand onto the battlefield and draw a card, repeating this process any number of times
Above all, always remember that playing a land is a free action