Effective Against
Pagan GodsStakes made from evergreen wood are effective against certain pagan gods, particularly those from Northern European traditions. The evergreen's symbolic association with eternal life and the winter solstice connects it to the seasonal worship cycles of many pagan traditions, making it a thematically appropriate weakness.
Usage
An evergreen stake must be driven into the heart or a vital area of the pagan deity. The effectiveness varies by the specific god — some are killed outright, while others are merely weakened. The stake works best against gods whose worship was tied to seasonal cycles and agricultural fertility.
In Supernatural
Evergreen stakes were used in "A Very Supernatural Christmas" (Season 3, Episode 8) against Madge and Edward Carrigan, pagan gods of the winter solstice who had been requiring human sacrifices. The Winchesters fashioned stakes from their Christmas tree and used them to kill both gods.