- Heavy—duty cryotech support vehicle.
- The Bison is a hero vehicle available to Serina. In Serina's employ it is a heavily-
- armored and shielded vehicle that synergizes well with other cryotech vehicles
- and abilities. It is fitted with a powerful Coldsnap launcher, which fires
- experimental cryo shells that damage and chill enemies caught in its area—of—
- effect. The launcher can be upgraded, which increases the launcher's range, rate
- of fire, and chill effect. When the Bison deploys it leeches ambient heat energy
- to augment its defensive systems, creating a chill aura that affects nearby
- enemies. These systems can also be upgraded to further boost defenses and
- the area of the chill aura.
- Bisons are versatile, durable vehicles that served in most groundside combat
- elements of the old Colonial Military Authority [CMA] in a number of roles,
- including armored personnel carrier and recovery vehicle. It remains in service
- with several UNSC Army units and local militias [such as the Sedran Colonial
- Guard]. The variant designed by Serina uses the proven chassis as a testbed
- which holds a vacuum energy siphon, scientific instrumentation, and cryotech
- weaponry in one mobile package. As there are no Bisons aboard the Spirit of
- Fire at present, Isabel has looked at improving and repurposing the siphon with
- her own research data on Forerunner vacuum energy cells, but the delicacy and
- intricacy of Serina's manufacturing template complicates this effort.