Nike is suing the company that released a customized shoe in collaboration with artist Lil Nas X.
The controversial shoe, known as "Satan Shoes," was created by MSCHF. The company revealed the shoes contain a drop of human blood inside the sole.
Nike accuses MSCHF of trademark infringement.
Lil Nas X is not named in the lawsuit, but all 666 pairs of the modified Nike shoes sold out quickly on Monday.