What it does
"Firaga" isn't an official Magic: The Gathering keyword or ability—it's actually a fire spell from the Final Fantasy series. With Magic's Final Fantasy Universes Beyond set, you might see cards themed around such spells, but "Firaga" as a mechanic doesn't exist in the comprehensive rules.
If you encountered this on a specific card, check its actual rules text rather than assuming a keyword meaning. Most likely you're thinking of a damage-dealing instant or sorcery (a burn spell), which would simply deal damage to a target as printed.
In Commander, ordinary burn spells matter for removal and reach, but remember the 40-life starting total makes direct face-damage less efficient than in 20-life formats. If you can share the exact card name or text, I can give you precise rulings.
Iconic cards with Firaga
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