Will the likes of South Pole Voyager, Earthen Ally, Suki, Courageous Rescuer, and Momo, Friendly Flier be enough to make an Ally Tribal deck competitive in Modern
If you have the range and numbers in your instants and sorcery spells and blue mana you can't go too far wrong
Cunning Lethemancer + Necrogen Mists Cunning Lethemancer pressures the hand of each player at the table, so you better be prepared to discard some cards
If she ends up being a top ten card in the format then $10-$15+ is possible
Honorable Mention #2 Despark In Type Four, this normally reads, "Exile target non-land permanent" Honorable Mention #3 - Finale of Promise This is probably the only Finale that's not impossible in Type 4 to run as it's an immediate win (like Fireball would be or a firebreathing Shivan Dragon or a Braingeyser that can force your foe to draw their entire deck)
Still, easy to imagine a world where you want a maindeck answer to Lessons, Momo, and Reanimator that still has game against landfall and this will work