See p86 of the Leagues of Votann Codex and associated updates and errata.
- This unit can ignore any or all modifiers to its Move characteristic and any or all modifiers to its Advance or charge rolls. - Each time this unit Advances, do not make an Advance roll. Instead, until the end of the phase, add 3" to the Move characteristic of each model in this unit (add 6" instead if this unit is ACCELERATED).
- Each time an attack is made against this unit, your opponent cannot re-roll the wound roll and cannot re-roll the damage roll. - Each time an attack is allocated to a model in this unit, the Armour Penetration characteristic of that attack is reduced by 1 (to a minimum of 0).
Each time an attack is allocated to a model in this unit, subtract 1 from the Damage characteristic of that attack (to a minimum of 1).