6 Pilgrims may be upgraded to a Grail Reliquae.
Must always be placed in the centre of the front rank of the unit. Only once all the Grail Pilgrims in the unit (except the Command Group) are removed does the Reliquae itself start taking wounds.
In addition, the presence of the Grail Reliquae means that the entire unit will be affected by the Blessing of the Lady.