What it does
Rough Divide is the watermarked ability word found on the Modern Horizons 3 "split" land cycle—actually, that's not quite right. Let me be accurate: there is no standard keyword named "Rough Divide" in Magic.
If you've encountered "Rough Divide" on a card, it's almost certainly a card name, not a keyword or ability word. For example, it could be a flavorful name for a sorcery, land, or creature, where the actual rules text spells out exactly what the card does. Magic keywords (like flying, trample, deathtouch) appear in italics and have defined rules, whereas card names like "Rough Divide" carry no inherent mechanical meaning.
To get a proper explanation, check the card's actual text box and type line. If you can share the full card text, I can break down what it does, the rules nuances, and how it plays in Commander.
