We played a 4 player Wild Fire mission and had a blast.
By turn 5, the entire table was engulfed in flame, with all models taking a POW 12 hit every turn.
The 4 players were Cryx, Cygnar w/ Stryker, Cygnar with Caine, and Everblight.
A bit of bad luck allowed me to kill the Cryx player early, but Everblight was putting a powerful hurt on Caine's force as the fire expanded.
Caine managed to blink a bit to dodge damage, but eventually the two warcasters were walking around with all their focus shielding themselves (plus Stryker had Arcane Shield up) while the everblight caster was transfering damage into his warbeasts like a fiend.