cards like replenish mtg regular from Urza's Destiny (UDS) Proxy Replenish | Magic The Gathering

Each color in Magics color pie has several things its best at

The theme is so specific that cards like Kasla, the Broken Halo dont fit anywhere outside the deck, and the power level of the individual cards here is much lower than the rest

With so many great commanders at your disposal, why should you care about some commanders with affinity

If you want to be a little more cut-throat, that's certainly a good place to start

Mox Sapphire + Mox Emerald + Mox Jet For the same reasons as the original dual lands, Mox Sapphire, Mox Emerald and Mox Jet wind up as the most expensive of the Moxes

By turning all nonbasic lands into Mountains, Blood Moon has the potential to either stall or completely devastate your opponents mana base depending on the deck theyre playing