The Sarcophagus Specimen originated from early 20th-century longevity experiments where researchers mummified human subjects using volatile chemicals in sarcophagus-like containment units. A catastrophic power failure during the laboratory's decay breached its chamber, reanimating the specimen through residual mutagenic energies. Now freed, it wanders the fairways, seeking to spread its ancient contaminants and complete its interrupted transformation.

The Sarcophagus Specimen possesses a desiccated physical form that is highly resistant to physical damage due to its mummified state. It moves with a slow, relentless pace, emitting a low-frequency hum that disrupts electronic equipment and disorients living beings. Its bandages are saturated with ancient mutagenic compounds that cause rapid decay on contact, and it leaves a trail of toxic dust that contaminates the environment. The specimen can regenerate minor injuries by absorbing ambient chemicals, making it a persistent threat.

The Sarcophagus Specimen acts as a guardian of key contaminated zones within the laboratory complex, patrolling areas where ancient experiments were conducted. Its presence accelerates environmental decay and forces players to navigate around its toxic influence, adding strategic challenges to their rounds.