Overview
Surrounds your body with an aura of vengeful spirits, causing damage to anyone who strikes you for 4.0 mins @L15 to 9 mins @L35. Requires, but does not consume, a pearl when cast.
Era info: Starts off doing a static 8 damage, before increasing to 9 and beginning to scale up with level in April 2000 era: https://www.project1999.com/forums/showthread.php?t=360588
Note: Updated Banshee Aura: buffdurationformula 7 -> 9, buffduration 30 -> 90, effect_base_value1 -8 -> -6, max1 0 -> 12, formula1 100 -> 110 (17 Feb, 2013 Patch, who knows what it means).