This is targeted using the Bow Skill.

Flame Arrow [26] 
    Innate Attack (Impaling) 1d [12.8] 
        ST-Based (Thrust) [+100%] 
    Innate Attack (Toxic) 2d [17] 
        Follow-Up [+100%] 
    Magical [-10%] 
    Spell Components [-30%] 
        Must say "venom arrow" in Latin 
        Must touch a pair of canines in the mouth 
Level 2 [33] 
    Add Extended Duration (x3) [+20%] 
        Caster retains ability for 3 seconds 
Levels 3-7 [37/40/43/46/49] 
    Increase Extended by 1 step [+20%]