1And the fifth angel blew his trumpet, and I saw a star fallen from heaven to earth, and he was given the key to the shaft of the bottomless pit.
“He was given the key to the shaft of the bottomless pit.” To have a key to a house or a car implies the right to use and/or exercise control over that house or car. In this case, the star may exercise control over the shaft of the bottomless pit.
1 And the fifth angel blew his trumpet, and I saw a star fallen from heaven to earth, and he was given the key to the shaft of the bottomless pit.