Despite the sheer quantity of absurdly good Zombie Tribal support cards already, Archghoul of Thraben makes a strong case for getting a spot in the 99
At the beginning of the next end step, if any of those cards remain exiled, put them into your graveyard, then create a 0/1 colorless Eldrazi Spawn creature token for each card put into your graveyard this way
Borderless versions of Yavimaya Coast, Adarkar Wastes, Shivan Reef, Sulfurous Springs, Karplusan Forest, and Caves of Koilos were all shown
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Living End involves putting creatures into the graveyard, while Glimpse of Tomorrow involves you filling the board with permanents, but Temur Footfalls simply just casts the cascade spell to get the pair of rhinos
There can also be too much of a good thing in this category do not take this deck building step as an endorsement to replace all basic lands in your deck there are plenty of cards that can prey on you for pursuing this route like Back to Basics, Ruination, and Price of Progress