Blister

The Flood Blister is a small stationary flood form encountered on the Ark in 2559.

Description
The Flood Blister is a small flood form that is encountered in the Halo Wars 2 DLC, Awakening the Nightmare. It has the appearence of a large pulsing egg and is a stationary. It acts as an incubation chamber for Flood Infection Forms and will violently explode and release these parasites if ground forces move too close to it or if it is damaged from range. The blister itself is made out of left over corpses or dead plants that aren't used for combat forms.