While the tail’s purpose remains largely unchanged from the original Defiler template, it has been evolved to allow the Viper to maintain its balance and direction while flying—as well as steering. What truly stands out, however, are the ingrown, crystalline spikes on the tip’s surface. These “crystals” emit a powerful pulse that the Viper uses to locate its targets with pinpoint accuracy.
Despite their formidable appearance, the Swarm has crippled the offensive capability of these limbs, relegating them to the role of simplistic vice-grips. The protruding spikes are porous bone structures—able to pierce flesh and immobilize prey without inflicting lethal damage—directly linked to the creature’s lymphatic system. When on the prowl, the spikes exude a pheromone that makes the Viper seem innocuous and non-threatening to its hapless victims.
The Defiler was a creature born out of festering, carcinogenic pathogens which were, in essence, the leftover genetic chains
from other Zerg strains. This crude support weapon—as dangerous to the enemy as it was to the Swarm itself—evolved into obsolescence after the Brood War. Now, with the need for a specialized support strain, the Swarm seems to have revisited and perfected the Defiler template with genetic data from an as-yet-unknown species, preserving its core functions while excising its unnecessary lethality.
This elongated organ—the Viper’s digestive system—spans the entire length of the creature’s body. Just as a frog uses its tongue to catch prey, the Viper regurgitates its flexible intestines with great force in order to grab and pull a target towards its location.
The Viper can separate the ionic chains present in the hardened tissues of Zerg nest structures to produce a nourishing fluid. Said fluid acts as a catalyst for the plethora of microorganisms present in its bloodstream, which generate bioelectrical energy to replenish the Viper’s stores.