A bright red flower that faces certain directions all in unison.
Nobody can quite understand the power that turns the flower but it is a very enchanting encounter when there is a large shift in the Wizard’s Rube. A bright fiery flower that grows in bunches which suddenly, as a unit, shifts it’s direction 90 degrees. It is considered good luck if you are able to witness a Rube Change, as it is called.
Most often it is very subtle as it slowly rotates its gaze. Every Wizard’s Rube that has been checked has always uniformly pointed the same direction no matter how far apart they are.
There might be something in your world that drives this change.