The startup Olympic-style sports festival promising no drug testing has filed an $800 million antitrust lawsuit against its main critics for what it claims is an illegal campaign to make athletes boycott its own event.

The Enhanced Games is a sports festival that bills itself as better than the Olympics because it allows athletes to benefit from using performance-enhancing drugs.

A group led by Donald Trump Jr. is infusing funding and some political muscle into the Enhanced Games, a sports festival that would hold track, swimming and other events free of anti-doping measures.