Speed Force
In season seven, Iris is still working to find her way out of the Mirrorverse as Eva messes with her mind. After being rescued, the residue of the Speed Force in her comes in handy when helping to restore the Speed Force so that Flash can take on Eva McCulloch. With help from Iris and Flash, Eva shatters her mirror clones. It was later revealed that the restoration of the Speed Force also sent out different energies in the sky that created the Sage Force, the Still Force, and the Strength Force.