Air Flight
During the Retreat Step of the Reserves Phase, Firewalker units may move from any terrain that contains Air (blue) to any other terrain that contains Air (blue) and where you have at least one Firewalker unit.
Flaming Shields
When at a terrain that contains Fire (red), Firewalkers may count save results as if they were melee results. Flaming Shields does not apply when making a counter-attack.