Wormwood

Wormwood is used in Supernatural to referrence a star that will come to Earth when the Apocalypse has begun. Dean figures out that the War arrives when this star falls to Earth^{5.02 Good God, Y'All}

• The term Wormwood was first mentioned by Dean Winchester in 2.13 Houses of the Holy in referrence to a type of wood.
• Dean uses this term in 5.02 Good God, Y'All in referrence to a star.

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Wormwood facts

• The name wormwood did actually appear in The Bible as a word of uncertain origin (Greek: apsinthos) which symbolizes a sort of bitterness, or figurative calamity.