Reward: The storm risen: the gang gains a permanent free mount upgrade (one bike becomes an Attack-Bike or a master-crafted bike at no cost) and a lasting Reputation bonus as a fully-mounted host, and its Cavalry re-roll failed charge distances for the rest of the campaign. The endless charge made permanent. Claimable once per campaign.
Declare Ride the Storm at the campaign's start. The sub-plot advances one step each time your gang wins a battle with a majority of its Cavalry still mobile at the end — never pinned, never fixed — or each time it recruits a new mounted body: an Outrider, a Scout Bike, an Attack-Bike or an Invader ATV. It resolves when the host reaches six steps, the mounted brotherhood grown into an unstoppable storm.
When it does, the storm has risen. Your gang gains a permanent free mount upgrade — one bike becomes an Attack-Bike or a master-crafted bike at no cost — and a lasting reputation bonus as a fully-mounted host, and its Cavalry re-roll failed charge distances for the rest of the campaign. The endless charge made permanent. This sub-plot can be claimed only once per campaign.