What it does
"Particle Beam" isn't an official Magic: The Gathering keyword or ability—it doesn't appear in the comprehensive rules or on any card. It sounds like flavor text or a name borrowed from sci-fi rather than a game mechanic.
If you encountered this on a card, double-check the exact wording: it may be the name of a card (titles don't grant rules meaning by themselves), or you might be thinking of a similar real ability. Damage-dealing effects in Magic typically use keywords like "deals damage," or mechanics like Ping (from cards like Prodigal Sorcerer), but none are called Particle Beam.
For Commander specifically, there's nothing to evaluate here. If you can share the actual card name or its full text box, I'll gladly break down how it works, the common rules pitfalls, and when it matters in multiplayer games.
Iconic cards with Particle Beam
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