rust fungus (noun)

1. In the enchanted forest, the rust fungus spread rapidly, causing the plants to wither and die.

2. In the movie, a group of scientists battles against an evil villain who plans to unleash a deadly rust fungus upon the world.

3. Why did the gardener fear the rust fungus? Because it turned all the plants into rusty statues!

4. According to ancient Greek mythology, rust fungus was believed to be the result of Zeus' anger towards disobedient plants.