Mis-chance, which means bad luck or unfortunate event, has several antonyms that connote positivity and success. The first antonym is serendipity, which is defined as a happy or beneficial occurrence by chance. Another antonym is fortuity, which means an unexpected event of good fortune. Success is also an antonym of mis-chance, which denotes achievement or accomplishment in life. Finally, fortune or luck is also an antonym of mis-chance, which suggests that something positive or advantageous is happening. In conclusion, while mis-chance represents bad luck or an unfortunate event, its antonyms connote positivity, good fortune, and success.