Grim Visage

Grim Visage is a Horde-only reputation and experience gain bonus that is available only during the Hallow's End seasonal event. To acquire the buff, a player uses the bonfire in front of the Wickerman in the Ruins of Lordaeron, then uses the Wickerman Ashes that are created.

A Time to Build Up instructs players to perform this procedure, but it is not required for the buff. The buff can be obtained as many times as desired at any time during the holiday. It does not persist through death.