stroke of luck

as luck may have it

Synonym of as luck would have it (“by chance, luckily”).

be in luck

To be lucky in getting something that one wants.

better luck next time

Used to wish somebody hope in future success after a failure.

devil's luck

astounding good luck.

down on one's luck

Unlucky or undergoing a period of bad luck, especially with respect to financial matters.

dumb luck

pure chance; luck

luck of the draw

The random production or occurrence of favorable or unfavorable results.

luck out

To experience great luck; to be extremely fortunate or lucky.