This is a great value card that works well in black or Dimir steal decks, but I think is better as an on-curve four-drop than as your actual commander
Both these cards are old and won't be reprinted and while they're not needed in order to have a successful Shrine deck, having them will boost the power of the deck substantially
Cultivate is one of the best though, because it not only puts a land card into play, but also puts one in your hand
Unlike most of the prowess-style team pump triggers, Balmor also grants trample , which gives it the evasion these effects crave
5 Roil Elemental An excellent blue creature that can put in a lot of work in the late stages of a game, Roil Elemental is a 3/2 flying elemental for six mana
As mentioned, the downside of these new Saga Creatures is all upside when Narci is in charge