How do you use crestling in a sentence?

The word "crestling" is not a standard English word. It's possible you are thinking of a different word, or it might be a misspelling.

Could you please provide more context or clarify what you mean?

For example:

* What was the original word you were trying to use?

* What is the sentence about?

* Is it a made-up word?

With more information, I can help you find the correct word or create a sentence that uses the word you intended.