Nike is suing the art collective behind the Lil Nas X “Satan Shoes” with human blood in the mid sole, that have sparked a social media backlash.

In a lawsuit filed Monday, Nike accuses MSCHF Product Studio, Inc. of trademark infringement over the designer’s 666 pairs of modified Nike sneakers made in collaboration with the “Old Town Road” singer.

The controversy began last week with the release of the music video for Lil Nas X’s latest single “Montero, the video portrays the singer as both a fallen angel and a demon who rides a stripper pole to hell where he gives a lap dance to the devil.

The lawsuit notes that social media users have threatened to boycott Nike over the controversial shoes.

A screen shot of shows Lil Nas X holding one of the modified shoes.

The modified black and red Nike Air Max 97 sneakers — adorned with a bronze pentagram charm and a drop of human blood in the mid-sole — are the latest customized Nike footwear product to be released by MSCHF.