Descriptive:
* The moonlight cast an elfish glow on the forest, illuminating the delicate leaves and the glimmering stream.
* Her eyes held an elfish sparkle, full of mischief and magic.
* The ancient tree was carved with intricate elfish symbols, each one whispering of forgotten stories.
Action-Oriented:
* The elf moved with elfish grace, his feet barely touching the ground as he traversed the forest.
* The archer took aim with elfish precision, his arrow finding its mark with deadly accuracy.
* The bard's voice carried an elfish melody, captivating the hearts of all who listened.
Humorous:
* He had an elfish grin, the kind that only comes with getting away with something mischievous.
* The cake was decorated with elfish frosting, featuring tiny mushrooms and miniature gingerbread houses.
The best sentence for you will depend on the context and the tone you want to convey.