This is a Wizard's Guild restricted spell. Members may learn it at no cost.

Affliction [35] 
    Advantage [+50%] 
        Filter Lungs [5] 
    Fixed Duration [+0%] 
    Extended Duration (x1000) [+120%] 
    Malediction (As Regular Spell) [+100%] 
    Based on Activation Roll [+5%] 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "gas" in Latin 
        Must gesture with hands 
Level 2 [38] 
    Add Multiple Targets 1 [+50%] 
    Reduce Extended Duration by 1 level [-20%] 
Levels 3-7 [41/44/47/50/53] 
    Increase Multiple Targets by 1 level [+50%] 
    Reduce Extended Duration by 1 level [-20%]