Golden Frieza blasts the opponent with a Chaotic Dead End, then provides to rapid fire Death Beams in a Gatling Gun fashion, inflicting massive damage.
Golden Frieza uses this attack at the start of his battle with Super Saiyan BlueGoku, after hitting Goku into a mountain Frieza fires his Emperor's Death Beam at the godly Saiyan.
Appearances in video games
Emperor's Death Beam was named in Dragon Ball: Xenoverse, where it appears as Golden Form Frieza's Ultimate Skill. It can also be obtained by the Future Warrior In DLC pack 3 in New Parallel Quest: "Frieza's Siege Against the Earth!". The amount of beams fired depends on the amount of ki the user has. It is a part of the Resurrection ‘F’ Pack DLC.
The attack also appears in Zenkai Battle under the name Death Counter. In this appearance it is used as a counter rather than an ultimate attack.