Nobody's paying 10 mana per creature to swing at you when there are other targets at the table
Your biggest problem will be defending Teval, who has no protection against removal, will suffer when cards are exiled, and who must constantly jump into the fray of battle
You can cast it as Coil and Catch for an instant-speed spell that draws three cards and discards one, and then Marang River Regent shuffles back for more potential casts just like the aforementioned Green Sun's Zenith cycle
A nice double whammy is reanimating this card for cheap with a stacked hand and then casting Last March of the Ents, drawing you 12 cards and enabling you to put even more free creatures into play
As of now, the release dates for the three Final Fantasy Secret Lair drops havent been announced yet
The new cards will be called Saga Creatures, which players can summon for aid in battle