A unit that contains one or more models with an Oath Stone can never choose to flee as a charge reaction, cannot be disrupted and, if any of its models are armed with hand weapon and shield, they can make Parry saves against attacks made to their flanks and rear. In addition, the presence of the stone with the unit confers Magic Resistance (1) as its runes act to absorb wild magic. Furthermore, a character with an Oath Stone must always accept a challenge (if your unit contains more than one character with an Oath Stone, you can choose which of them accepts the challenge). However, if a model on an Oathstone fails a Break Test, he is removed as a casualty as he fights to the very last.