Staff of Change

Models with the Mark of Tarentch only
The bearer can re-roll any number of the dice rolled to cast or dispel a spell. The second result(s) stand. This can effectively negate'the effects of a Miscast and cause an Irresistible Force (and the equivalent results when dispelling). If the bearer-casts a spell with Irresistible Force using the staff's re-roll ability, the staff will exhaust its power and cease working for the rest of the battle.