at one stroke

prepositional phrase2

1. •
   With a single blow, effort, or act.

   • I should be ready to do the job without being paid for it, though I don't say it is not sweeter to get both gold and revenge at one stroke. — 1898
2. •
   (figurative) At once, immediately; in an instant.

   • . . . with the wind of ruin in his hair, Soul sprang full-statured from the broken flesh, And at one stroke he lived the whole of life. — 1909