sponge mushroom (noun)

1. In the comic book, the character stumbled upon a hidden treasure chest filled with sponge mushrooms.

2. In the cartoon, the lovable characters went on a quest to find the rare sponge mushroom that held magical powers.

3. In the fantasy novel, the protagonist encountered a wise old witch who taught them how to find the elusive sponge mushroom.

4. The artist painted a beautiful still life of a basket filled with vibrant sponge mushrooms.