beast of prey noun

One that devours other animals, esp higher animals, applied usu to the Carnivora

mark of the Beast

1. A stamp on the forehead or right hand of a worshipper of the Beast (Antichrist) as in the Bible, Revelation 13
2. Hence a sign of whatever was considered to be of the Antichrist, or (loosely) evil or even bad manners

number of the beast

666, the apocalyptic number

the beast with two backs

A man and a woman in the act of having sexual intercourse

prey /prā/

1. The creature or creatures that a predatory beast hunts and kills as food
2. A victim or victims
3. A sufferer from (depression, fears, etc) (with to)
4. Booty, plunder (archaic, rare)
5. That which is preserved from loss in battle, eg one's own life (Bible)
6. Depredation (rare)
7. The act of seizing (Spenser, Shakespeare)

1. (with on or upon) to hunt and kill (another creature) as food, to attack as prey
2. To bully, exploit or terrorize as victims
3. To distress or afflict
4. To make depredations on
5. To take plunder from

To plunder

preyˈful adjective (Shakespeare)

Bent upon prey

beast of prey and bird of prey see under beast and bird respectively.