The problem is that the landfall deck lacks identity
All in all, it's a very straightforward, but very potent recipe for victory
Below, Im looking at the black spells and staples that control boards, fuel engines, and close games in Commander and other non-rotating formats
In your draw step you can draw, for free, two more cards and then place two cards you've drawn on your deck in any order, so it's like a free Sensei's Divining Top, and if you replace those draws with something like Abundance then you'll not have anything to put back so you get all three effects
So if you can ready her after she quests, you could challenge with her and, if she is banished, she returns to your hand
Making Elves cost 1 less is fair, but Elf decks can easily ramp mana, so getting extra cards is the real appeal for this sylvan tribe