Representing Final Fantasy X's Zanarkand, Ancient Metropolis introduces a new style of land that can be played either as a land, tapping for green in this case, or played as a Sorcery-Adventure
Some, with their sheer power
Maybe there's a one-off poison card in Final Fantasy , but it would be very odd to have it return as any sort of major mechanic, especially with Phyrexia: All Will Be One still lurking in the rearview, toxically
The big money cards include Darksteel Plate, Sword of the Animist, Fire-Lit Thicket, and Clever Concealment, with the latter two approaching $20 or more
If lore counters are removed from a Saga, the appropriate chapter abilities will trigger again when the Saga receives more lore counters
Here is one of my favorite variants on the mechanic that we explored before landing on our final version