Corruption tokens track the amount of corruption added during the game. Whenever you add 1 corruption, place 1 corruption token in the Shadow scoring area.
Corruption tokens are usually added due to path combat, but may also be added or removed as directed by card text.
If a card directs you to remove a corruption, but there are none to remove, the directions are ignored.
Each corruption token is worth 1 victory point for the Shadow team.