Even if that doesnt end the duel, Rainbow Bridge sets you up to own the duel on your second turn, starting off with a fresh hand of 6 cards, any Field Spell of your choosing, and Crystal Beast Cobalt Eagle
Permanents do not immediately go to the graveyard right after they are cast
Which means she shouldnt even be here
Of course, you can run synergy cards like Secret Plans to provide card advantage whenever a permanent is turned face up while also using Splendid Reclamation or Crucible of Worlds to return lands that may have gone to the graveyard thanks to the manifest dread mechanic
Gix, Yawgmoth Praetor While not many people use Gix, Yawgmoth Praetors second ability, its there for when you want to discard a handful of lands and, in turn, play free spells from your opponents side