The Shape of the Nightmare to Come/Awesome


 * The last battle of Brother-Captain Stern of the Grey Knights, given that he came closest to killing Abaddon.
 * The defense of Titan, especially how they defeat the besieging army of Valchocht the Maker: they turn their litanies of hate into a Combined Energy Attack that wipes out every daemon on the surface. The sequel reveals that they keep fighting even 1000 years later when all their bullets are spent, their blades are blunt, and their armor has stopped working.
 * The defense of Nu Marsus against an invading Slaaneshi horde.
 * The Last Stand of the Orks against the New Devourer. To detail,Wazdakka Gutsmek (an Ork Warboss) leads the biggest Ork ‘WAAAAGGGHHHH!’ in history with almost a million trillion Orks in the largest battle in the history of the entire galaxy. The account describes ork ships ramming bioships at mind-bending speeds and then the orks streaming out to fight.
 * During Ethelred's battle against the Daemon Prince Lothar, a cunning Blood Claw defeats a Khorne Berserker guarding a bridge by running up beneath him and stabbing upwards to disable the Berserker, allowing a Rune Priest to decapitate the Chaos Warrior. Yes, that is a re-enactment of the battle against the Viking at Stamford Bridge.
 * A Baneblade manages to disable two Necron Monoliths (with a lucky shot, then with its machine spirit pulling a Heroic Sacrifice) so a transport can escape with all that remains of a world's population.