This paper completes the triptych on black holes in Transformative Semalgebraic Ontology (OTS). The first panel treated the event horizon topologically, as the boundary of outward inactualisability. The second panel treated the event-horizon crossing dynamically, as the irreversibility of actualisation seen from outside. The present panel treats the four magnitudes that make the black-hole case appear conceptually sinister: mass, time, gravity, and the invariant rate c. The thesis is not that th