Anyone know any spells that would cause a man to be sterile?
Honey, YouTube is full of those!!! Check it out. Unless you want something more complex.
Not a spell per se, but the demon Zepar can make people sterile and barren, try working with him.
Has anyone done one and do you know if it worked?
All you need is STRONG INTENT! A simple black candle will suffice. I’ve done wost that than and yes it works.