The card itself is quite strong, allowing you to grab a few cheap lands in the interest of building up a hefty mana pool
Check out this pair of creature-lands
Living Plane turns every land into a removal target, something that lands usually avoid fairly well
Is it better? Nope it sure isnt Well is it at least as good? Nope! Is it in the vein of at least tap stuff down for no mana like Opposition? Nope! Is it a frustrating reprint in Blue of Winter Orb or Rising Waters? Nope! But you say its repeatable and an engine
Artifact Color tag templates(None) Umbral Mantle Equipped creature has " , : This creature gets +2/+2 until end of turn." ( is the untap symbol.) Equip Artifact - Equipment Color tag templates(None) Artifact (CTRL to add secondary) Creature Qty: 24 Price: 68.65 Barbflare Gremlin First strike, haste Whenever a player taps a land for mana, if this creature is tapped, that player adds one mana of any type that land produced
Spelunking Spelunking is useful on far more than caves, and really only takes a land or two that would've entered untapped to be worth playing