I never recommend running Geyser or Quicken in any Commander deck
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Examples of these groups include the original Gen 1 Legendary Birds, a trio of Articuno, Moltres, and Zapdos, and Gen 7's 'Legendary quartet' of Tapu Bulu, Tapu Fini, Tapu Koko, and Tapu Lele - known as the Guardian Deities
Theyre super easy to slot into any deck and often focus on utility effects like drawing cards, searching the deck, or boosting consistency