Opportunism

Opportunism
Skill type: Skill
Skill subtype: Passive Offensive, anti-magic
Primary user: Thief
Duration: Instant
Range: Current spellcasting enemy
Requirements: any melee weapon, but stronger with a Dagger
Syntax: Automatic

When subject to a spell which targets them, thieves may deliver a quick blow with their weapon. This strike is not sufficient to disrupt the actual casting.

Thieves wielding daggers will be able to strike with full force, while other weapons will only deal half damage.