What it does
"Double Overdrive" isn't a real Magic: The Gathering keyword or ability—it doesn't appear in any official rules, card text, or the comprehensive rules glossary. You may be thinking of a different mechanic, a card name, or terminology from another game entirely.
If you're looking for something similar, Magic has "Overload" (cast a spell affecting all valid targets instead of one), "double strike" (deal both first-strike and regular combat damage), or various "doubling" effects like those on Doubling Season or Furnace of Rath. There's also "Riot" and "Dash" for aggressive, haste-granting plays.
If you can share the exact card name or where you saw "Double Overdrive," I can tell you precisely what it does and how it plays in Commander. Otherwise, I'd recommend double-checking the spelling or source—it's likely a custom card, a misremembered term, or from a non-MTG game.
Iconic cards with Double Overdrive
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