It starts off fantastic with no other work needed (compare the something like Resolute Reinforcements), but Ajani, Nacatl Avenger is just absurd if it flips early enough in a game
A 4/5 flying trampler for four mana with an easily mitigated drawback sounds like a good deal to me, especially when you can leverage milling yourself for other benefits as well
Translation for the notes above, starting from the top left in clockwise order: The right part of Arcanines mane looks like a ponytail blowing in the wind, so try to make it a bit shorter
Literally any word you pick functions the same as any other word
They are great lands in a vacuum and will be huge when paired with the Verges
After spending a lot of time to figure out exactly which cards would be leaving (again - way harder to do than it should be) and doing a lot of research on competitive Pauper events, here's the 25 cards you'd need on the "additions" list