scourger
noun/ˈskɜː(ɹ)d͡ʒə(ɹ)/
Etymology From scourge + -er.
1
One who, or that which, scourges.
- the unravellers of cunning, the investigators of artifice, the humblers of pride, and the scourgers of oppressionAugust 1, 1824, Sydney Smith, The Lawyer that Tempted Christ (sermon)