What it does
I don't have reliable information about a Magic: The Gathering keyword or ability called "Mold Earth." This isn't a recognized MTG mechanic, keyword, or ability that I can confirm exists.
It's possible you're thinking of a similarly named card, a mechanic from another game (Dungeons & Dragons has a cantrip called "Mold Earth," for example), or perhaps a custom/unofficial card. There's also a chance it's a newly released ability I'm not aware of, or a misremembered name.
If you can share the exact card name or where you encountered "Mold Earth," I'd be happy to help. Alternatively, if you meant a real MTG keyword—like Landfall, Domain, or something earth/land-related—let me know and I'll explain it accurately for Commander play.
Iconic cards with Mold Earth
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