Template:Pseudorand
This template accepts one parameter X, and will return a different number every time it is used, between 0 and X-1. However, the number isn't random, it is based on the current time. Due to a bug with the mod function it doesn't even use the microsecond time {{CURRENTTIMESTAMP}} but the time in seconds, making it even further away from being random.
For example, {{pseudorand|13}} returns 1.