Scarlet Delirium is a job ability from Final Fantasy XI. It can be obtained by Dark Knights at level 95. It has a duration of 1 minute 30 seconds and a recast time of 3 minutes. When activated it afflicts the user with a unique defensive effect that states "Damage you take is being channeled into enhanced attack and magic attack". During this time, any damage the Dark Knight takes begins being funneled into an attack and magic attack boost. After taking damage, the effect is changed to an offensive one that states "Attack and magic are enhanced". While the offensive effect is active, any boost obtained by the defensive effect is applied.
Scarlet is a bright red with a slight orange tinge. Scarlet and other bright shades of red are associated with courage, force, passion, heat, and joy. In the Roman Catholic Church, scarlet is worn by a cardinal, and is associated with the blood of Christ and the Christian martyrs, and with sacrifice. Scarlet is also often associated with immorality and sin, particularly prostitution or adultery, largely because of a passage referring to "The Great Harlot", "dressed in purple and scarlet", in the Bible.