Mark of Tzeentch

A model with the Mark of Tzeentch has a 6 + ward save.
If a model with the Mark of Tzeentch already has a ward save, the Mark of Tzeentch improves that ward save by 1 instead (to a maximum of 3 + ). 
In addition, a Wizard with the Mark of Tzeentch re-rolls any channelling dice rolls of a 1.