Murmukusmon

Murmukusmon is a Demon Lord Digimon whose name and design are derived from the mythological Murmur. Although it was once a senior Angel type Digimon, it fell to the dark side and became this Demon Lord type Digimon. It is the chief executive of the "Nightmare Soldiers", bearing the nickname of "Earl", and was the one who brought 30 legions of demons together. Moreover, it is accompanied by the Mythical Beast Gryphonmon, who serves as its steed. Its special attack is "Gehena Flame", which spits out a wave of burning flame that continues to suffer its attacker and lingers on even after death.

Digimon Frontier: Island of the Lost Digimon
In the past, Murmukusmon was banished to the Lost Island for his evil deeds. There, he discovered the sealed Ornismon and the prophecy to revive him by gathering fractal code. He destroyed the inscriptions in order to prevent anyone from figuring out his plans and then assumed control of both the Human Digimon and Beast Digimon by becoming their leaders as Darcmon and Hippogriffomon respectively. As leader of the two armies, he is able to incite hostilities and prolong the war as long as he wants, drawing out sacrifices on each side.

Murmukusmon eventually realizes that he is close to having enough fractal code and arranges for a final confrontation for the two groups. Unfortunately for him, the DigiDestined are present on the island, where they reveal his duplicity. It is for naught, however, as he takes the stage at that moment to absorb all of the dead Digimon from that battle and use it to revive Ornismon. Murmukusmon then shows his true form, riding Ornismon as a ruler. Though he is strong, fending off attacks by all of the DigiDestined, his previous subordinates turn against him and Ornismon for his betrayal. Their attacks are enough to distract him, and Agunimon uses the confusion to strike a fatal blow on the would-be ruler, defeating him for good.

Role in Ultima
In Ultima, Murmukusmon  .

Attacks
 * Gehenna Flame: Spews hellfire which is said to inflict death and eternal suffering.
 * Necro Interrogation