Marked

Marked is a debuff inflicted by the Anti-materiel Rifle, Auralis, Caustic Staff, Deep Wounder, Lunic Eye, Marked Magnum, Skullmasher, and Tyranny's End. It halves the target's Damage Reduction. If the target is an enemy that has no Damage Reduction, it instead reduces the enemy's defense by 5. When inflicted with the debuff, the target is tinted a bright purple.

Trivia

 * The debuff is a reference to a status effect of a similar name from the game, Darkest Dungeon which also reduces the defense of targets.
 * This debuff was previously known as "Marked for Death" and is still referred to as such in the mod's source files.
 * This name is shared by a skill from Darkest Dungeon which inflicts Mark.