A serve that veers off sideways after hitting the net instead of coming straight back. Its weapon is deception, not power.
The serve is the one action your opponents cannot interfere with — and the rulebook deliberately caps its power: the ball may not reach the receiver above their shoulder height in an athletic stance. That is why the cut wins points and the hammer does not. Two rules are worth knowing while you drill it: the ball has to rise at least ten centimetres out of your tossing hand before the other hand strikes it, and you get two attempts. The typical mistake is hitting your two cut directions from two different set-ups — then your opponent reads the direction before you even make contact. Practise both from exactly the same starting position. And only take the cut into a match once you know its hit rate: the second serve is no place for experiments.