What is XLM? 

Vibrant is built on the Stellar blockchain protocol. XLM, or the “lumen” is the native asset of the Stellar blockchain protocol. It’s a cryptocurrency that acts as an intermediary asset when making exchange transactions, 

In Vibrant, you can send and receive XLM the same way you might with other digital assets like ARST or USDC. 

You can read more about the history of the lumen here.