It was accidentally released by Raynor's Raiders when they destroyed the facility's power core, and went on a rampage throughout the facility, killing terrans (of both factions), zerg and protoss alike. The Raiders escaped in a Hercules dropship, prompting it to "scream" as they did so.
During it's rampage, it only uses Consume DNA on the protoss it encounters.
The Castanar hybrid was invincible in the game mission itself, prompting the player to focus on escaping.
Visible on the computer screens are the following information of the hybrid:
- Synthetic DNA restoration 36% completed
- Genetic mutations found in chromosome 12, 18
- Probability of time-shift mutation ~ 13%
The rest of the installation equipment details are rather vague/fuzzy to make out:
- Subject showing increasing signs of aggression:
- ______ - 13.3
- Blood acidity - 4.7
- Stasis Parameters
- Local Mutations Found
- Code 109B592
- Code 926