This variation of the Pyrotechnics spell is designed to surprise, as it initially produces an identical cloud of smoke, but after a few seconds this cloud bursts into flame.

Incendiary Cloud [80] 
    Obscure (Vision) 10 [63] 
        Extended (Infravision) [+20%] 
        Ranged [+40%] 
        Area Effect (4 yard radius) [+50%] 
    Innate Attack (Burning) 1d [14.75] 
        Area Effect (4 yard radius) [+50%] 
        Persistent [+40%] 
        Delay (Fixed, 2 seconds) [+0% 
    Innate Attack (Toxic) 1 HP [1.98] 
        Only Affects Creatures of Flame [-40%] 
    Malediction (Speed/Range Table) [+150%] 
    Based on Activation Roll [+5%] 
    Link [+10%] 
    Can Snuff Out Fires [+5%] 
        Torch-sized or smaller 
    Requires Oxygen [-5%] 
    Must Target a Fire [-40%] 
    Magical [-10%] 
    Spell Components [-10%] 
        Must gesture with hands