Sherlock Holmes and Doctor Watson were doing their usual investigative business one day, when the uncovered an amazing painting.

At first glance, it looked like a picture of normal oak tree, in the middle of a wilderness, but if you looked closer, you could see that it was a very surreal painting: The tree's trunk was actually made of fire, and it's branches were made of ice, clouds and earth.

"What is it?" asked Watson in awe.

"It's an element tree, my dear Watson," said Holmes.