Since Roman times, people have associated the hand's fourth digit with the wearing of rings. In many cultures, a proportionally longer ring finger in men has been taken as a sign of fertility.
The ball explodes on impact, knocking enemies to the ground and dealing 1d3+3 fire damage per two caster levels (a successful Reflex save reduces the fire damage by half and negates the knockdown effect) and 1d2+2 force damage per caster level (no save) to targets in the area.
Cats become infected with a botfly larva when they come into contact with a blade of grass that has a maggot on it. The movement of the cat against the blade of grass stimulates the maggot to crawl onto the cat. The maggot then crawls around on the cat until it finds an orifice in which to enter.