Calaf gets all three: hope, then blood, then Turandot herself. Then he sets her a riddle of his own, his name by dawn, which is what Nessun dorma is about.
In Puccini’s opera, Princess Turandot sets every suitor three riddles and has the losers beheaded. The first: what is born each night and dies each dawn?
Give me a hintThe hint
The whole world calls on it in the dark.
Reveal the answerHide the answer
Hope
Source: Giacomo Puccini, Turandot, libretto by Giuseppe Adami and Renato Simoni, La Scala, 1926