Death
Death's jurisdiction extends across all 8.7 million estimated species on Earth, yet it remains curiously limited to biological entities. A rock cannot die. A mathematical equation persists unchanged. Death is fundamentally a biological phenomenon, requiring the prior existence of life to have any meaning whatsoever. Its universality, whilst impressive within its domain, is nonetheless bounded by the requirement of living subjects.
Time
Time's dominion knows no such boundaries. It governs the decay of radioactive isotopes, the expansion of the universe, and the orbit of planets with equal authority. Every particle in existence experiences time's passage, from quarks to quasars. Time operates in vacuums, in black holes (albeit strangely), and in dimensions we cannot perceive. Its universality extends beyond the biological to encompass the entirety of physical reality.