Here's what we do know:
* Leprechauns are known for their gold. They often guard pots of gold at the end of rainbows, but catching them is notoriously difficult.
* They are mischievous and tricky. They can be playful and even helpful, but they can also be deceitful and prone to using illusions to escape capture.
* They have a strong connection to nature. They are often associated with forests, meadows, and other natural environments.
While there may be stories or modern interpretations where leprechauns use magic words, in traditional folklore, their magic seems to be more about their inherent abilities and connection to the natural world.