set on

verb3

1. •
   To be determined to do or achieve something.

   • I had my mind pretty well set on working for a small company.
2. •
   To encourage someone, or an animal, to attack someone.

   • I will set the dogs on you, if you don't leave right now!
3. •
   To attack.

   • Cassio hath here been set on in the dark. — 1603