mirabile dictu (Latin): wonderfully, amazingly; wonderful to relate; It's a miracle!
Used in a sentence:
"Repeatedly, Dodd insisted that he had had nothing to do with the bonus-protection language in the, ahem, Dodd Amendment until, mirabile dictu, he remembered that he had." -- "Forget Bonus Outrage, What About 'ShariAIG?'" by Diana West, Henderson Daily News, March 26, 2009, p. 2