What it does
Ceaseless Tempest isn't a standard Magic keyword—it appears as a unique ability on a specific card rather than evergreen rules text. If you've encountered it, it's almost certainly tied to a particular card's printed ability or a custom/unofficial card, so you'll want to read that card's exact wording, since the effect is defined entirely by its own text rather than a reusable rule.
Because it's not a recognized keyword, there's no general nuance to memorize the way there is for trample or deathtouch. The most common mistake is assuming it behaves like a known mechanic; instead, follow the literal text and any reminder text in parentheses.
In Commander, just treat it as a one-off effect. If you're unsure of its source, double-check the card on Gatherer or Scryfall to confirm the official rules text before building around it.
Iconic cards with Ceaseless Tempest
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