These can be incorporated into your decks as a subtheme sometimes, or they can occasionally be a main theme in a very particular/lucky draft
In Commander, mana dorks are run in the majority of green decks, so this seems like an easy ramp staple
Anyway, it's a powerstone that taps for 2 colorless, so you can drop Urza, next turn drop your powerstone, and hopefully the turn after meld them, and then turn around and reduce a lot of costs by a lot
By sheer volume, it's seen most in The Ur-DragonThe Ur-Dragon decks, though by percentage it appears most frequently in Kona, Rescue BeastieKona, Rescue Beastie decks at a 40% clip
While Disneys Lorcana is one of my favorite family games to play, as well as one of the best two-player games, its been hard to get it into the hands of players