Voiced By: John Leigh
Ruler of the Underworld, Octomus for most of the series sent his minions to take over the Surface World for him. Octomus nearly succeeded in leaving the depths of the Underworld after he stole the Mystic Rangers Legend Warrior powers but was stopped by Leanbow and trapped within him until the Ten Terrors steal his soul back. He chooses Matoombo as his host and begins his conquest of the Surface World. He first goes after the Mystic Mother and kills Daggeron & Leanbow. He nearly succeeds in killing the Mystic Force Rangers if it weren’t for Itassis taking him out of commission temporarily. He grows however but is taking down by the Mystic Force Rangers feeding him an endless supply of magic.
Voiced By: Andrew Robertt
General of the Underworld, Morticon lead the armies of the Underworld from the inside due to him being unable to leave the Underworld. He does leave the pit temporarily after Koragg steal the Mystic Rangers Megazord power but is quickly sent back there. He does succeed in leaving the pit a second time after the Gates Sf The Underworld rise to the Surface World. He is destroyed though by the Titan Megazord’s Mystic Strike.
Voiced By: Donogh Rees
Necrolai is the Queen Of The Vampires and a servant of whoever is leading the forces of the Underworld at the time. As Queen Of The Vampire, Necrolai is shown to have the ability of immortality shown when Chip attempts to destroy her with the Dawn Crystal after she turns Vida into a vampire and fails. Necrolai has a human looking daughter named Leelee who aides her as a spy on the Surface World until she decides she wants to live life as a normal human. After Octomus is revived and Itassis is destroyed by Black Lance & Sculpin, Necolai decides to defect from the forces of evil and revives Itassis as well as Daggeron & Leanbow. However, after reviving Leanbow & Daggeron, she is turned into a human and shortly after starts a relationship with Toby.
Voiced By: Geoff Dolan
Koragg came to be after Leanbow was trapped in the Underworld and transformed into a servant of Octomus. Koragg is shown to be well skilled in both the art of magic and fighting. He is also shown to have an honorable code as he won’t destroy an opponent unless he or she is of equal strength. Koragg eventually learns of his true identity of Leanbow and defects to the side of good.
Voiced By: Stuart Devine
Imperious was once a Mystic named Calindor who defected to the side of evil during the Great Battle. He was trapped in a cave for many years up until Necrolai found him and brought him to Octomus to be reborn as Imperious. There he replaced Morticon as the Leader of the Underworld and unlike Morticon decided to use his plans that required intelligence over brawn. He summoned the Barbarian Beast to set out on a plan to capture the genie Jenji and for a short time the planet was ruled by the Morlocks. Imperious was shown to be very power hungry as he desired to rule the Underworld and plotted to get rid of Octomus for a short time. After learning that he could never get away with it, he decided to gain his masters favor by stealing the Mystic Rangers Legend Warrior powers so that Octomus may get stronger. Prior to Octomus rising out of the Underworld, he challenged his old rival Daggeron to a duel, which he lost and inevitably turned to dust.
Voiced By: Greg Smith
Magma is the first of the Ten Terrors chosen by the Stone Of Judgement to attack the Surface World. Before Magma can fight the Mystic Rangers in his giant form, he is destroyed by Sculpin after he lost the game he started.
Voiced By: Andrew Laing
Oculous is an ace sniper that succeeded in capturing all the Mystic Rangers except Nick. After Nick learns about his connection to Fire Heart, he is destroyed by Nick as the Red Dragon Fire Ranger.
Voiced By: Sally Stockwell
Serpentina found out early that she was to be chosen by the Stone Of Judgement so she send Hekatoid to prevent Nick & Vida from morphing. After being chosen by the Stone Of Judgement, she releases her snakes onto Briarwood that causes petrification. After succeeding in eating five of the Mystic Rangers in her snake form, she is defeated by Nick & Vida after Itassis gives them their ability to morph back. She grows and is destroyed by the Manticore Megazord.
Voiced By: Dallas Barnett
Megahorn is shown to be very impatient when it comes to the Rules Of Darkness and ultimately breaks them at one point by taking on Daggeron before his turn to attack the Surface World. He is eventually chosen to attack the Surface World and is challenged by the Snow Prince after he sees that the Mystic Rangers need his help. After defeating them in Snow Prince’s Dimension, he is challenged to a one-on-one battle by Daggeron which he ultimately loses. He grows after this and is aided by Black Lance to destroy the Mystic Ranger but that doesn’t help him as he is destroyed by the Solar Streak Megazord.
Voiced By: Charlie McDermott
Hekatoid is first recruited by Serpentina to give her a leg up when she is chosen to attack the Surface World by preventing Nick & Vida from morphing. Later on, he travels to the Lake Of Lament and succeeds in capturing Udonna before being chosen to attack the Surface World. After being chosen, Hekatoid plans on using his poison frogs to cover the Surface World. However, his plans fail after Udonna is freed and regains her power and he is destroyed by Udonna and the Mystic Rangers combining their magic.
Voiced By: Cameron Rhodes
Matoombo along with Gekkor & Sculpin succeeded in obtaining Octomus’ soul from Leanbow. After retrieving Octomus’ soul, he is chosen by the Stone Of Judgement to attack the Surface World and plans on destroying the Surface World by using a ball of electricity to cause total devastation. However, he has a change of heart after talking to Vida and he decides extinguish the ball of electricity. Shortly after, Matoombo is chosen to host Ocotomus’ soul but refuses to do so. To prevent Ocotmus from being reborn, he decides to travel to The Dawn Dimension to sleep for eternity so that Octomus would never be able to be reborn. However, Sculpin beats him there and slays him in order for Octomus to use his body to revive himself. After Octomus is destroyed, Matoombo is shown to be revived jamming with Vida at the Rock Porium.
Voiced By: Mark Ferguson
Gekkor along with Matoombo & Sculpin succeeded in in obtaining Octomus’ soul from Leanbow. After Matoombo defects from the Ten Terrors, Gekkor is given the task of capturing Matoombo in order for Octomus to use his body to be reborn. He fails at this task however and is destroyed by the Wolf Warrior.
Voiced By: Josephine Davidson
Itassis is given the task of making sure The Rules Of Darkness are not being broken. Itassis is shown to crave knowledge over powers shown where she aides the Mystic Rangers in return for some answers about how they are able to defeat them. After being chosen personally by Octomus to unleash her wrath on the Surface World, she has second thoughts on her existence and is destroyed by Black Lance & Sculpin after not fulfilling Octomus’ wishes. She is revived by Necrolai after showing her kindness and aides the Mystic Rangers in destroying Octomus for good. After Octomus is destroyed for good, she is shown talking to Daggeron about courage.
Voiced By: Derek Judge
Black Lance is the second-in-command of the Ten Terrors and is shown to be one of the most powerful of the Ten Terrors. Black Lance first battles the Mystic Rangers while Megahorn is battling them and uses his chariots to give the Mystic Rangers a good thrashing until Leanbow intervenes and teleports him away. After Ocotomus is revived he takes on the Mystic Rangers on last times as he is destroyed by them when they combine their powers together to destroy him.
Voiced By: Peter Daube
Sculpin is the leader of the Ten Terrors and is in charge of reviving Octomus by any means. After learning that Ocotmus’ soul is being held by Leanbow, he attempts to reacquire Octomus’ soul and succeeds in doing so with the aide of Gekkor & Matoombo. After Octomus is revived, Sculpin succeeds in capturing Udonna but doesn’t for long when a revived Itassis destroys him.
The Hidiacs serve as footsoldiers to the Morlocks.
Stronger than regular Hidiacs, the Styxoids are usually shown leading the Hidiacs in battle.