From EQ2i, the EverQuest II wiki

EverQuest 2 Spell Information

Brainburst Illusionist Deals unresistable mental damage over time to a target. If this effect is not cured when it expires, the target is dealt additional mental damage. Target Enemy Power 5 Casting 1.0 second Recast 8.0 seconds Duration 24.0 seconds Range Up to 35.0 meters Level 3 Mastery Disruption Effects Applies Migraine on termination. Inflicts (X) mental damage on target Inflicts (Y) mental damage on target instantly and every 6 seconds

Brainburst Spell Line I II III IV V VI VII 3 10 17 31 45 59 72

Gray cells correspond to unavailable ranks of the spell. Effect values for this spell are modified by the player's Intelligence.