Metaphor or Simile?

metaphor If you brag that "the world's your oyster," you're using a metaphor from Shakespeare, who knew a thing or two about figures of speech. simile Use the noun simile when describing a comparison between two fundamentally different things, such as: "His voice was smooth, like butter in a warm pan." [Source.](https://www.vocabulary.com/articles/chooseyourwords/metaphor-simile/)