With powerful payoffs that can burn your opponent out or generate a bunch of tokens, you can find plenty of reasons to fill your deck with these cards
Beyond the basic Arcane Signet and Sol Ring, artifacts that produce mana feel wasted in this deck, so it could have gone heavier on card draw, equipment, or vehicles to really power up this strategy
Whenever Yuma enters or attacks, you may sacrifice a land to draw a card, and whenever a desert is put into your graveyard from anywhere, you get a 4/2 green Plant Warrior token with reach
Equip Artifact - Equipment Color tag templates(None) Inquisitorial Rosette Inquisition Agents Whenever equipped creature attacks, create a 2/2 white Astartes Warrior creature token with vigilance that's attacking
Adjust based on your commander and strategy
The Most Competitive If I had to choose one of the decks to upgrade to a competitive level, itd be either of the tri-colored ones