What it does
I don't have reliable information about a Magic: The Gathering keyword or ability called "Sorcerous Inspiration." This doesn't match any official keyword, ability word, or named mechanic that I can verify.
It's possible you're thinking of a specific card name, a mechanic from a non-MTG game, or a misremembered term. If you meant something like Sorcery speed (the timing restriction allowing you to cast things only during your main phase with an empty stack) or an ability word like Cohort, Spell mastery, or Magecraft, I'd be happy to explain that instead.
If you can confirm the exact card name or where you encountered "Sorcerous Inspiration," I can give you accurate rules text and Commander context rather than risk inventing mechanics that don't exist.
Iconic cards with Sorcerous Inspiration
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