The Prins Variation is a great surprise weapon for e4 players. Sicilian Defense players aren’t used to it as much, and the move f3 often confuses them.

For the basics of the Sicilian Defense, main variations and opening ideas watch this introductory video: https://youtu.be/impkeLfyyVM

Theory of the Accelerated Dragon: https://youtu.be/rd1eKLJ3DGQ
Theory of the c3 Sicilian (Alapin): https://youtu.be/VGP0qWscORM

The Prins Sicilian occurs after the normal opening moves of the open Sicilian (1.e4 c5, 2.Nf3 d6, 3.d4 cxd4, 4.Nxd4 Nf6, 5.f3). Players with white most commonly play 5.Nc3, defending the e4 pawn which is under attack by the f6 knight. The move f3 simply defends e4 while still leaving the option of c4 and the Maroczy bind open.

If you are a c5 player, you should be aware of this line. I have surprised many players who were higher rated than I was simply because they had no idea this was a legitimate line and knew absolutely no theory.