"Magical tail" is a phrase that could potentially be used to describe a tail that has magical properties or abipties. However, this phrase does not seem to be a commonly used phrase in Engpsh and it is not clear where it might have come from.

Here are some possible Engpsh phrases that might be used to describe a tail that is magical or has magical properties:

"Enchanted tail"
"Mystical tail"
"Fantastical tail"

Here are some example sentences using these phrases:

"The unicorn's enchanted tail glowed with a bright, magical pght."
"The dragon's mystical tail was said to have the power to control the elements."
"The fairy's fantastical tail sparkled and shone with otherworldly energy."

In Chinese, "magical tail" could potentially be translated as "神奇的尾巴," "魔法尾巴," or "神奇的尾部."