The foundation was alerted to SCP-####'s existence when engineers at the Chernobyl New Safe Confinement reported being attacked by the reactor. An agent working in the CNSC contacted the foundation, who in turn gained approval from the Ukrainian government to send a team to the site. When containment teams arrived, they were guided to the entrance to the original Shelter Structure.
After establishing a perimeter and speaking with the survivors of the first entry attempts, the initial Containment Team gained entry to the Sarcophagus. Inside, they found SCP-#### in the process of sifting through radioactive waste, storing what it could in the remains of the reactor it had hosted itself in.
Believing SCP-#### to be the reactor itself, the initial force deployed an EMP in the hopes of disabling the entity long enough to give them an opportunity to contain it. However, SCP-#### transferred itself into one of the adjoining pipes and began assaulting the agent who had deployed the EMP device. Upon realising SCP-#### was not the reactor itself, the containment team fell back to treat Agent Kairn's injuries and updated mission command, who deployed MTF-## in response.
MTF-## were able to deduce from he available intelligence that SCP-#### was at least drawn to radioactivity. Working on this assumption, they requested a sample of Polonium. Once the sample arrived, MTF-## we're able to draw SCP-#### out of the Sarcophagus and into a small cart they had placed the radioactive element into.
Though SCP-#### began rolling towards the exit as the cart, MTF-## we're able to stop it's escape and transfer the Polonium and SCP-#### into a shielded container on a lorry. Thinking they had contained the SCP, MTF contacted Mission Control with the all-clear, I forming them they were on the way to Site ##.
Mission Control recieved a request for reinforcements, MedEvac and supplies approximately 28 minutes later. SCP-#### had transferred itself through the vehicle's parts and taken control of the front axle, detaching both front wheels of the lorry at a speed of 50-55 MPH. The resulting crash killed both Agents in the cab and injured 4 other Task Force Agents.
Reinforcements were informed of SCP-####'s observed anomalous properties and informed by Mission Control to retrieve the Polonium and use it to lure the entity into a small, magnetised object, allowing them to transport SCP-#### while minimising risk of it touching and transferring to anything else. Agent Hannover suggested one of his spare, unpainted miniature soldiers.
Agent Hannover's miniature was placed on a door that had broken off the lorry, with the Polonium sample resting on it's base. SCP-#### transferred itself to the door as soon as it was able, then moved itself into the miniature soldier. Immediately, the soldier let go of the gun's barrel to pick up the sample, but 4 MTF-## members encircled SCP-#### and activated their Directed Electromagnetic Field Projectors, successfully establishing initial Containment of the entity.