Tissue Compression Eliminator The Tissue Compression Eliminator ( or TCE ) , also called a decompression eliminator , ( AUDIO : " The Evil One " ) was a trademark weapon of the Master as he fought UNIT , searched for new life in his decayed body , and especially after he assumed the appearance of the Trakenite Tremas . ( TV : " The Keeper of Traken " ) He admitted that he wasn ' t sure about the name , if it eliminated victims through tissue compression or if it , in fact , eliminated tissue compression . ( AUDIO : " The Two Masters " ) Function . The Fourth Doctor once described the method by which the Master killed as " matter condensation . " ( TV : " The Deadly Assassin " ) As its name suggested , the TCE killed by drastically compressing the bodies of its targets to the point where life functions ceased , firing a modulated beam of graviton s and Pym particle s . ( PROSE : " The Quantum Archangel " ) Eventually , the victims were no longer visible after the exposure , but the Master liked to leave the shrunken doll - like corpses of his victims as a calling - card for the Doctor to discover . ( TV : " The Deadly Assassin " ) The TCE was equally capable of shrinking inorganic tissue : victims ' clothes were also shrunk . On one occasion , the Master demonstrated the weapon by shrinking empty space - suits . ( TV : " Planet of Fire " ) According the Sally Armstrong , it usually compressed people by a factor of 10 . ( AUDIO : " Eyes of the Master " ) gave Sally a TCE which also acted as a communicator . ( AUDIO : " The Reviled " ) History . used the TCE to kill Goodge to infiltrate a radio telescope for the Nestene Consciousness . ( TV : " Terror of the Autons " ) He once materialised his TARDIS within UNIT HQ and attacked the Third Doctor . In the brawl , the Doctor took the TCE and the Master fled . The Doctor threatened the Eighth Doctor with the TCE , hoping he would hand over the TARDIS . Ultimately , he decided against it and handed the device to his future self . ( PROSE : " The Eight Doctors " ) Before his disfigurement , the decided to " spice things up a bit " by using a staser instead of the TCE . After swapping bodies with , ( AUDIO : " The Two Masters " ) he returned to using the TCE . ( TV : " The Deadly Assassin " ) The Master used it to kill a camera technician on Gallifrey . ( TV : " The Deadly Assassin " ) The Master used it to kill several humans and Logopolitans in 1981 . ( TV : Logopolis ) The Fifth Doctor was able to use the TCE to sabotage ' s TARDIS . ( TV : " The King ' s Demons " ) On another occasion the Master used the TCE against a velociraptor revived by the fountain of youth . However , it landed right back in the fountain , re - emerging unharmed but miniscule in size , making a comical sight . ( PROSE : " A Town Called Eternity " ) The Sixth Doctor stole and used it to threaten and the Rani ; later Peri Brown did the same . ( TV : " The Mark of the Rani " ) During his first encounter with the artificially - enlarged mechanoid freelance peacekeeping agent Death ' s Head , the Doctor used a TCE ( which he happened to have on him ) to defend himself against the mercenary . Death ' s Head was not injured , but found himself returned to his original size ( that of a normal humanoid ) , which he remained for the rest of his career . ( COMIC : " The Crossroads of Time " ) Izzy Sinclair was shrunk after being shot with a TCE without being killed outright by ' s disciple Sato Katsura . She was later able to use the weapon to reverse the process . ( COMIC : " The Glorious Dead " ) also gave one to Sally Armstrong . ( AUDIO : " Eyes of the Master " , " The Reviled " ) The TCE was used by Es ' Cartrss of the Tactire through a simulated reality in the Matrix of the Doctor ' s TARDIS , while posing as the Valeyard . ( COMIC : " The Forgotten " ) Replacement . Following his regeneration into , the Master used a laser screwdriver in lieu of the TCE . ( TV : " The Sound of Drums " ) As , she began using a new device that worked as a vaporising energy weapon , a camera , or even a time stop . ( TV : " Dark Water " )