I've been wanting to make this but never got around to it until now, I know it's not completely accurate but I did my best and I hope everyone enjoys it, for those of you who don't know The Methane wagon from Halo Wars 2, it is unstable, slow, and a "modified Shadow" (I call BS) it emits a methane aura that makes nearby Unggoy (Grunts) aggressive and it can launch kegs of methane. This unit is used by the leader YapYap the Destroyer in Halo wars 2 multiplayer.