The stasis shell is a Terran Dominion technology invented shortly before the Defenders of Man Insurgency. It has the ability to warp a target away before they take fatal damage, and use medical machines to begin to heal the target back to combat readiness. The process takes a short time period. During the conflict against the Defenders of Man, this device was used to aid Agent Nova Terra and her covert ops crew.
The stasis shell serves a similar function to the chrysalis used by Sarah Kerrigan in Heart of the Swarm. If Nova is dropped to 0 health during a mission where her survival is not a mission objective, she will be taken to one near a command center. If the command center has lifted off, the stasis shell will spawn at the traversable ground. After 60 seconds, Nova will revive from the stasis shell.