Even without adding in any landfall or other mana-based combos, simply playing a fetch land like Evolving Wilds or Terramorphic Expanse will instantly transform Tifa Lockhart into a 4/4 creature with trample
Cards like Storm herd can be played cheaply by reducing your cost with your commander, or can be exiled from the top of your deck spawning a ton of dragon cards
Important cards to watch for in the Celestial Guardian set include Incineroar ex, Crabominable ex, and Solgaleo ex, along with Pom-Pom Style Oricorio
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Start with beginner-friendly sets that are easier to understand and fun to open
Witherbloom, the Balancer Affinity for creatures first showed up on a simple 4/4 with vigilance and that Argivian Phalanx costs two less mana than Witherbloom, the Balancer which is a stronger creature and grants a huge cost reduction and will straight up give you nearly free colorless instants and sorceries like Warping Wail or Skittering Invasion