Lifting objects that are
qualitatively superior to 3-dimensional space, and thus exceed basic infinite mass. Examples of this might be characters who inhabit a realm where even normal objects hold such superiority over an ordinary 3-D space, and who thus can be inferred to be able to lift them.
Do, however, note that characters who exist as living spacetime continuums or similar do not automatically qualify for this, as spacetime is not a material object, and thus does not have mass being met by an opposing force (Unless otherwise stated). Therefore, simply existing as one is unquantifiable in terms of Lifting Strength.