Enmity is rife in the Warhammer world, where many races have nurtured grudges and animosities against others for thousands of years, and overwhelming hatred is a potent force in battle.
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
HatredURL Copied!
A model striking a hated foe in close combat re-rolls all failed To Hit rolls during the first round of combat – this represents the unit venting its pent-up hatred upon the foe. After this initial blood-mad hacking, the impetus is considered to be spent – the rest of the combat is fought normally. Sometimes a model will only Hate a specific foe. Where this is the case, the type of foe will be expressed in the special rule. In the case an enemy hates a certain faction, they have the Hatred rule against all models from that army book. In addition, they must also re-roll successful rolls to restrain from pursuit against enemies they have Hatred against. If a unit would gain Hatred in a round of close combat after the first for any reason, treat this as the first round of combat for that purpose.