Which line of dialogue from act iii, scene i of romeo and juliet most foreshadows that mercutio’s death will lead to other tragic events in the story?

benvolio: o romeo, romeo! brave mercutio’s dead;
that gallant spirit hath aspir’d the clouds,
romeo: this day’s black fate on more days doth depend;
this but begins the woe others must end.
tybalt: thou wretched boy, that didst consort him here,
shalt with him hence.
prince: romeo slew him, he slew mercutio;
who now the price of his dear blood doth owe?