The Sunday Brawl is an intense $50,000 GTD progressive knockout tournament that features multiple flights every day of the week. The final flight begins at 1:15pm ET every Sunday. Players who survive 19 levels of play earn a spot in Day 2, which start at 5pm ET on Sunday.
You can enter the $50,000 GTD Sunday Brawl for $20+$2, but there’s also a cheaper $5,000 GTD Sunday Brawl for just $2+$0.20, which also has multiple flights.
You can find more information here.