What it does
I'm not familiar with "Dynastic Codes" as an official Magic: The Gathering keyword or ability, and I don't want to invent rules for something that may not exist.
It's possible this is a custom or unofficial mechanic (perhaps from a fan set or a homebrew like Mythicwyrm's own content), a misremembered name, or a very recent addition I can't verify. Real keywords it might be confused with include things like "Coven," "Conspire," or set-specific mechanics.
If you can share the card text or the set it's from, I can explain how it works, the common rules pitfalls, and its relevance in Commander. I'd rather get you accurate information than guess and mislead your gameplay.
