What it does
I'm not aware of "Genomic Enhancement" as an official Magic: The Gathering keyword or ability. It doesn't appear in the comprehensive rules or any released set that I can verify.
It's possible this is a custom/homebrew mechanic specific to Mythicwyrm, a misremembered name, or a card from an unofficial set. If it's a platform-specific or fan-created ability, I'd need the actual reminder text or card to explain it accurately.
If you can share the card text or point me to where you saw it, I'll gladly break down what it does, the rules nuances to watch for, and how it plays out in Commander. Alternatively, if you meant a real keyword (like "Mutate," "Adapt," or "Graft," which deal with creature enhancement themes), let me know and I'll cover that instead.
Iconic cards with Genomic Enhancement
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