Name:Kilzone (project Zero as the terrans call it.) 
Age:Not yet dead
Gender:Male? (not sure how that works for the zerg.)

Bio:As a genetic mistake this monster was made with the ability to change forms, it was quickly noticed by the terran and protoss. It is in control of an small nest as well an small scouting team and hiding is one of their many arts...   

Ability:Can change form from hydralisk to mutalisk and back. burrow, underground movement, movement speed increase if on creep, attacks air and ground units.