Swordmage Attack 19Bane Blade
Attuning your blade's arcane might, you launch a devastating barrage of cuts and thrusts against your foe.
Daily Arcane, Weapon
Standard Action Melee weapon
Target: One creature
Attack: Intelligence vs. AC
Hit: 3[W] + Intelligence modifier damage.
Effect: Choose a creature type that the target has (animate, beast, humanoid, or magical beast). Until the end of the encounter, your attacks against creatures of that type deal 2d6 extra damage.
Published in Forgotten Realms Player's Guide, page(s) 32.