Crystal King's powers and abilities
Abilities
Nigh-Immortality: The Overlord is able to survive any lethal or fatal wound inflicted upon him such as the complete destruction of his physical form due to his status as the wellspring of all darkness and evil. Also, in the show itself, all statements related to the Balance state that shifting it allows the Overlord to gain a stronger and more direct prescence upon the world and doesn't actually affect his immortality.
Regeneration: The Overlord's spirit showed the ability to recover after its destruction in "Rise of the Spinjitzu Master" by Lloyd's Golden Power. He is also capable of repairing any damage afflicted upon his pure vessels.
Beyond-Dimensional Existence: The Overlord's truest being exists in an unknown void, that was shown in "A Sinister Shadow", during his dormant state and for a full return to the physical world and mortal plane of existence he needs a physical form.
- Manifestation: The Overlord uses avatars in order to interact in the physical plane.
Abstract Existence: The Overlord exists as conceptual source of all evil in the universe and as evil itself.
Levitation: In his spirit and Crystal King form, he was able to float freely, allowing him to travel on the Island of Darkness and the Crystal Island.
Resurrection: The Overlord has the ability to resurrect souls from the Departed Realm (whether he can only resurrect newly departed souls or ones that have been departed for a while as well is currently unknown). He used this power shortly after Harumi’s death after she vowed to serve him.
Enhanced Perception: He also appeared to have some form of enhanced perception, as he immediately sensed the ninja's arrival on the Island of Darkness. The Overlord also has some kind of perception of living beings (it is not known whether it was thermal vision or the Overlord sees the souls of beings themselves).
Enhanced Strength and Durability: After using Lord Garmadon's body to retake a physical form, the Overlord gained enhanced physical strength and high durability, easily able to take Lloyd's attacks and overpower him.
Possession: As shown by the example of Lord Garmadon and the Borg Industries systems, the Overlord is able to possess objects, making them his hosts. Upon possessing Garmadon, the Overlord caused a mutation in his body, turning him into a dragon so the Overlord could regain his original form.
Powers
Darkness: The Overlord possesses the elemental essence of Darkness. Whilst in control of Lord Garmadon's body, he gained the ability to release dark energy from his hands. He usually fired this energy as offensive beam attacks, which could overpower Lloyd's energy beams and break his leg, but he could also use it to fly; by releasing small "jets" of energy from his lower pair of hands, the Overlord was able to hover in the air or propel himself at varying speeds.
Darkness Materialization: The Overlord can give life to inanimate statues. He uses this ability to give life to the Stone Army and the Crystal Warriors, in which the latter were created by having parts of them be replaced with the infectious crystals.
Dragon form: Over time, the Overlord can turn into his original dragon-like form, from which his strength and durability increased even further, due to his massive size. He could fly with the use of his large wings, breath dark fire, and spit masses of pure darkness that corrupt anything they hit (much like the Garmatron's Dark Matter shots). At the end of his battle with Lloyd, he displayed the ability to transform himself into a large orb of shadows that engulfs his foe—within the orb, his head grew to many times its original size, although it is unclear if this was purely an ability, or if his host body kept him physical. Even before his transformation as the Golden Master, he was the most powerful enemy the ninja ever met.
Crystal Creation: As the Crystal King, the Overlord can create his own crystals that can bestow anyone or anything his powers, or infect them.
Strength Bestowal: Upon giving Harumi a crystal, he allowed her to move massive hunks of debris to escape a collapsed building following her resurrection.
Telekinesis: As the Crystal King, the Overlord can use his crystals to levitate and move objects of great size (in this case the Crystal Island by using the central crystal) at will. This is similar to when he used Golden Power as the Golden Master to move all of Ninjago City and turn it into a fortress.
Crystallization: As the Crystal King, the Overlord can use his powers to crystallize terrain, people, objects, and even entire cities. Once Crystallized, said objects, people or terrain are under his full control, and whatever powers they possessed are also under his command as well. He wished to use this power to crystallize the ninja, and thereby gain dominion over the Elements of Creation.
Shapeshifting: As the Crystal King, the Overlord can change shape and size at will, as shown when he shifted his form to be that of a giant centaur-like creature.