A allusion to the random manner in which playing cards are distributed or "drawn" in many card games.
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Luck-of-the-draw Sentence Examples
In short, the colors all leave a stain behind, but how long it lasts seems to be luck of the draw.
Krishna uses his last few rupees to travel to a city, which by luck of the draw turns out to be Bombay.
The only possible disadvantage may be the fact that you can't type in a specific question, and that may lead you to wonder if those great cards you're getting are fate or, literally, the luck of the draw.