Revelation 1:18
I am the first and the last, and the living one; I died, and behold I am alive forevermore, and I have the keys of Death and Hades — Christ claims the titles reserved for God (Alpha and Omega, first and last) and announces his unique status: he died and rose, and this death-and-resurrection victory grants him sovereignty over Death and Hades themselves. The keys (exousia) represent absolute control; he alone determines who enters these realms.