Grail Relic The Grail Relic is a special model that is part of the Pilgrims unit, which counts as having Crew Attacks (A6) and Tough(6). This model and its unit get the Fearless and Furious rules. When combining two units of Pilgrims only deploy one Grail Relic and replace the other with 6 Pilgrims.
Tough(X) Models with this special rule must accumulate X wounds before being removed as a casualty.
If a model with Tough joins a unit without it then you must remove regular models as casualties before starting to accumulate wounds on the model with Tough.
When a unit with multiple Tough models takes wounds you must accumulate them on a single model until it is killed before starting to accumulate them on another.