What it does
"Frenzied Rampage" isn't a standard keyword ability in Magic: The Gathering—it doesn't appear in the comprehensive rules. You may be thinking of a specific card name, or perhaps confusing it with similar-sounding mechanics like "Frenzy," "Rampage," or "Bloodthirst."
For reference: Rampage N is an old keyword that gives a creature +N/+N for each creature blocking it beyond the first, rewarding you when opponents gang-block. Frenzy N gives an attacking creature +N/+0 if it's unblocked. These rarely show up in modern Commander but can surprise newer players.
If "Frenzied Rampage" is a specific card you're referencing, double-check the exact name and oracle text on Gatherer or Scryfall—card names sometimes evoke keywords without actually granting them. I'd be happy to break down the real card or mechanic once you confirm which you mean.
Iconic cards with Frenzied Rampage
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