The mirage are Purifier vessels equipped with phasing technology that would be fatal should a biological pilot attempt to use it. This technology allows the mirage to temporarily become incorporeal when engaging enemies, allowing them to avoid enemy fire.
The mirage is the Purifier variant of the phoenix, serving as the third starfighter option for the player with the phoenix and the corsair. Their passive phasing armor ability greatly improves their longevity in battle by letting them avoid a substantial amount of enemy fire on them. This makes the mirage best suited for prolonged frontline combat, and the most economical starfighter since it is harder to destroy. However, it is not as good at supporting ground armies; while it retains the phoenix's Graviton Beam, the phoenix is simply better than the mirage at using it due to being able to Graviton Beam two targets at once.