Changeling

"SKREEEEE!"

- A changeling

The changeling is a zerg spy produced by the overseer. It is a very weak and unstable creature with a short lifespan.

Lore
The changeling, composed of a protoplasmic substance, is capable of shape-shifting into a form resembling a terran. It can shift between specific appearances. It can even send out psionic impressions leading terrans to believe that everything is "all right".

It is intelligent, capable of operating computers. It possesses more strength than an unarmored human and can transform part of its body into a deadly bone blade, although its primary purpose does not appear to be combat.

History
"Zerg ain't dormant like they say, Sarge. Looks like they walking amongst us now."

- Wynne

The changeling was developed as late as 2504 by Infested Kerrigan, who was testing it against the terrans before war broke out. The Terran Dominion, learning about the new breed, also conducted their own tests.

Game Unit
The changeling has a limited lifespan, which is measured by a decreasing bar visible on the interface below the name, and it will die when the bar is zeroed. The changeling has its own wire-frame and portrait when not transformed. The changeling sometimes speaks, and its voice does not change when transformed.

The changeling game unit has no attack or abilities other than shape-shifting; any weapons it appears to carry are false.

The changeling's maximum hit points do not change, but they appear as the duplicated unit's hit points. For instance, a changeling resembling a will appear to have 45 hit points, but will in fact still have five hit points.

Videos
Video:Changeling SC2 VDevGame1|Changelings shapeshifting.