The phrase "devil luck" implies bad luck or misfortune, and therefore its antonyms would be words or phrases that denote good fortune or luck. Some possible antonyms for "devil luck" could be "good luck," "fortunate," "lucky break," "favorable outcome," "success," "blessing," and "prosperity." Other words that could be used to describe the opposite of "devil luck" include "advantage," "opportunity," "winning streak," and "windfall." In any case, when we talk about the antonyms of "devil luck," we are referring to words that promote a positive outcome, rather than a negative one.