Book excerpt: Collects Avengers Mech Strike (2021) #1-5. The story that gives new meaning to the phrase "Avengers Assemble!" Earth's Mightiest Heroes find themselves confronted with an unstoppable new menace: monstrous Biomechanoids seemingly impervious to every attack! But the Avengers aren't so easily beaten - and when new threats arise, powerful new tools must be brought to bear! Suiting up in high-tech individualized armor, the Avengers stand ready for one of their greatest battles yet as a shadowy mastermind makes the first moves in a deadly game of chess! While the team battles Biomechanoids across the globe, Iron Man and Black Panther try desperately to uncover their hidden enemy - and discover that the threat is far greater than they had previously imagined. The fate of the Earth hangs in the balance, and an Avenger will fall!