Slaves to None
Heretic Astartes models from your army lose the Dark Pacts ability, their ranged weapons gain Assault, and you cannot use the Cults of the Dark Gods rule when mustering. Vendetta: at the start of your Command phase, select one enemy unit as your Vendetta target until your next Command phase; your Heretic Astartes models (excluding Damned) can re-roll Hit rolls against it. Twisted Doctrine: in your Movement phase, each time you set up or select a Heretic Astartes unit (excluding battle-shocked units) to move, it can choose to Default to Doctrine, taking a Battle-shock test first, then choosing either to be eligible to shoot and declare a charge after Falling Back, or to declare a charge after Advancing.