The phrase "attack piece" refers to a negative and critical written or spoken article or commentary. It is usually intended to discredit or harm a person, organization, or idea. Full definition
This makes performing his blitz attacks a piece of cake, and ensures a 100 % success rate. (nintendoworldreport.com)
Whenever a successful video game launches the positive review scores are inevitably followed by attack pieces tearing it down explaining why the reviewers got it wrong, the game is overhyped, and so on. (tmrzoo.com)
I did not rely on one of the many attack pieces presented by biased Christians. (nakedpastor.com)