The Black Hole is the main antagonistic faction of the sixth season of The Flash. They are a criminal organization operating in Central City. They were associated with McCulloch technologies and ran by Joseph Carver, committing heavy crimes of metahuman trafficking and brainwashing, international arms dealing, and other illegal activities.
When Iris West-Allen started interfering with their plans, Carver hired light-based metahumans to target Iris and her family.