Hundred-Eyes Octopus is a powerful monster briefly shown in the One Punch Man manga. As one would probably be able to tell, the beast's nickname comes from it having many eyeballs, though not quite a hundred. It's a Demon level threat who belongs to the Monster Association, a group of Mysterious Beings dedicated towards taking down the heroes. The octopus's way of going about this goal is by devouring large buildings throughout I-City. As the more it eats, the greater its already immense strength becomes. His reign of terror throughout the city comes to an end after he gets stomped by Lightspeed Flash and is then finished off by Tatsumaki.
Powers and Stats
Tier: Unknown. Possibly at least 7-B
Name: Hundred-Eyes Octopus
Origin: One-Punch Man
Classification: Mysterious Being, Monster, Demon level threat
Powers and Abilities: Superhuman Physical Characteristics, Can increase its size and become stronger the more buildings it consumes, Possibly Enhanced Sight due to having over 15 eyes and multiple ones on its tentacles.
Attack Potency: Unknown. Possibly at least City level (Effortlessly swatted away Death Gattling, who was stated to be on S-Class level. Is classified as a Demon level threat. Also casually defeated Butterfly DX, who's a high ranking A-Class.)
Speed: Unknown. Possibly Massively Hypersonic+ (Can casually react to and intercept multiple high end A-Classes.)
Lifting Strength: Class M (Is the size of and can devour skyscrapers)
Striking Strength: Unknown. Possibly City Class (One shot Death Gattling)
Durability: Unknown. Possibly at least City level
Stamina: Likely very high
Range: Dozens of meters via size
Standard Equipment: None
Intelligence: Unknown. Seemingly instinct driver