I tend to throw thing together for rpg games based on things I over hear around the gaming table or at the pub. (So be warned, I may steal your words.) For example, I could have sworn that I heard my game buddies talking about how to make a Dire Wolf. Apparently the process involves feeding kittens to a wolf cub? The things that come our of the mouths of gamers!
A bit later, the same night, I came up with this spell.
Sharkwave: This spell allows the caster to create a wave of salt water in his hands. The wave then crashes into the intended victim and produced a shark which promptly bites said victim for 1d12 of damage. There is a 50% chance that sorcerer can increase the number of sharks produced by one per level. The components for the spell are a sharks tooth and a vial of salt water.