Eel Dragon

Eel Dragon (ウナギドラゴン, Unagidoragon) was a Dragon-level Mysterious Being. It was killed by Blue.

Appearance
Eel Dragon was a very large monster with multiple spike-covered heads. Each head has two eyes on the side of its face and a gaping mouth with rows of teeth, resembling that of lampreys.

Neo Heroes Uprising Arc
Eel Dragon first appears in L-City, where it obliterates the city's business district. It is promptly taken on by Blue, and the two engage in combat, with Blue dodging Eel Dragon's acid shot but remarking on its power. It is ultimately defeated by Blue after giving the hero a run for his money.

Abilities and Powers
As a Dragon-level Mysterious Being, Eel Dragon was an incredibly powerful monster, with even Blue, who easily dispatched a Demon-level threat, remarking on the danger of fighting it. Despite being ultimately defeated, it managed to give Blue a run for his money, forcing the hero to unlock all of his battle suit's limiters to take it down.

Physical Abilities
Immense Strength: As a Dragon-level Mysterious Being and due to its enormous size, it can be presumed that Eel Dragon possessed impressive strength.

Immense Durability: Eel Dragon possessed amazing toughness. Although it was defeated in the end, Blue has remarked on its durability as he stated that he could not tell if his attacks were working on Eel Dragon despite the hero unlocking all of his battle suit's limiters and striking it repeatedly.

Supernatural Abilities
Acid Spit: Both of Eel Dragon's heads could spit acid strong enough to dissolve buildings.