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Quote1.png Hurry! When we have finished here we will go to the great city that stands by the water! That is the next step in my plan to conquer mankind! Quote2.png


At some point during the 1950s, the deviant leader known as Kro assumed the identity of a Soviet soldier and conducted several nuclear tests in the Kenyan desert of Mombasa. The radiation from the tests mutated a common ant, increasing his size and strength a thousand fold, and granted him human-level intellect. Calling himself Grottu, he declared himself King of all insects and set about on a plan to conquer the world. His efforts were foiled by monster-hunter Ulysses Bloodstone (posing as a man named Frank), who succeeded in turning Grotto's ant followers against him, leaving him for dead.[2][note 1]

Grotto actually survived and by the early days of the Age of Heroes, Grottu was among the many creatures captured by the Collector and placed in his zoo of monsters deep underneath Canada. During an attack on the Collector's zoo by the Mole Man, the zoo's security failed, allowing the monsters to escape. The monsters eventually ended up in New York City where they proceeded to go on a rampage. The monsters were opposed and defeated by a group of heroes comprised of theThing, the the Incredible Hulk, Giant-Man and the Beast. Once they were defeated, the monsters were deposited through a portal into the Negative Zone.[3]

Grottu somehow returned to Earth through unrevealed circumstances and ended up imprisoned at the Giant Monster Museum located in Tokyo, Japan. The museum curator unleashed an increased the size of Grottu to battle the alien invader known as Tim Boo Ba when it later attacked Tokyo. However, this plan backfired as the two monsters caused, even more, damage to Japan together.[4] The monsters were later contained by the armored hero known as Iron Man.[5]

The inert body of Grottu later ended up in the possession of Frank Johnson for his Museum of the Monstrous and Strange. Unfortunately, Johnson's old enemy, Yucoya-Tzin, and his group of Aztecs entered the museum and performed certain rituals which brought the monsters back to life. These monsters, including Grottu, were opposed by the Fantastic Four and the Ant-Man. Despite fighting the Ant-Man and Invisible Woman to a stand-still, Grottu was burned to death by the Human Torch.[6]

Grottu's sentience did not die with his physical body, however, and it planted itself within the Ant-Man's helmet. Later, Ant-Man was transformed into Myrmidon by the High Evolutionary's Biogentron. This mutation made him more susceptible to Grottu's mental powers and he ended up fighting against the Fantastic Four, Thor and the Godpack. Grottu planned to return to his plans of world domination but was defeated when struck by electrical bolts from Thor and Blitziana which reversed the effects of the Biogentron. Grottu's essence was then expelled from the Ant-Man and his helmet and dissipated.[7] If Grottu is indeed gone for good remains to be seen.


Power Grid[9]
:Category:Power Grid/Fighting Skills/Poor:Category:Power Grid/Energy Projection/Single Type: Short Range:Category:Power Grid/Durability/Superhuman:Category:Power Grid/Speed/Normal:Category:Power Grid/Strength/Superhuman (25-75 ton):Category:Power Grid/Intelligence/Normal


  • Superhuman Strength: Grottu's strength level is several thousand times that of a normal ant, but his strength level is proportionate to an animal of his size and weight.
  • Superhuman Durability: Grottu's carapace is highly durable and can withstand impact from most conventional weaponry.
  • Animal Control: Grottu has the ability to communicate and control the hive minds of ants through the two antennae atop his head. The Ants are forced to do his bidding regardless of the command. When the monster-hunter, Frank, broke Grottu's antennae, he lost his ability to communicate with the ant colony's hive mind.


  1. Marvel Universe #4 and Marvel Monsters: From the Files of Ulysses Bloodstone (and the Monster Hunters) #1 confirms that both Kro and Ulysses Bloodstone were involved in these events.

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