Colossus (Piotr Rasputin) is a mutant whose powers were due to his cellular replacement of his organic structure with an extra-dimensional organic osmium steel. This allowed his body to increase his physical resilience and superhuman strength.
- Even as a teenager his superhuman strength was impressive placing him in the upper tiers of strength in the Marvel Universe at approximately 70-75 tons.
- This put his strength in the same class as Doc Sampson, The Thing, She-Hulk and Thundra.
- Since he was still a teenager, Xavier expected his physical ability to increase as he grew older. He was expected to achieve a Class 100 status making him the equal of The Thing, The Abomination, an un-enraged Hulk or Thor (without his strength enhancing belt or gauntlets).
- His physical strength is currently greater than when he first joined the X-Men due to the realignment of his cells by Magneto following an injury during the Mutant Massacre. (X-men #188)
- While in his armored form, Colossus requires no food, water, or even oxygen to sustain himself, and is extremely resistant to injury. He is capable of withstanding great impacts, large caliber bullets, falling from tremendous heights, electricity, and certain magical attacks.
Recently, Colossus has become an agent of Cytorrak, a near-immortal extra-dimensional being who is a member of a group of entities called the Octessence. These beings vast power is unmatched except by their mystical opposite, the Vishanti.
The Octessence trying to find a way to maintain their influence on the human world.
- The previous agent of Cytorrak was Cain Marko, brother to Charles Xavier. Marko was a normal human who was imbued with the power of Cytorrak. Cytorrak had been banished from the human realm and found a way to disguise a portion of his power in a Vietnam village.
- Cain Marko discovers the Crimson Gem of Cytorrak and read the inscription: “Whosoever touches this gem shall possess the power of the Crimson Bands of Cyttorak! Henceforth, you who read these words, shall become forevermore a human juggernaut!”
- The stone gives a fraction of the power of Cyttorak to whoever possesses it via acting as a portal to or containing a portal within it to the Crimson Cosmos. The infusion of power gave Cain Marko, superhuman levels of physical strength, resistance and durability. The power increase is so vast, when the Juggernaut begins moving in a direction, he is basically unstoppable.
- The power of the Juggernaut allowed him to battle entire superhero teams to a standstill. Juggernaut fought the X-men numerous times with the best result being Marko leaving the scene of the battle. Surrounded by a mystical field of force, Marko was basically invulnerable to harm and had the strength to shatter mountains when properly motivated. Only a few beings have ever managed to stop Marko once he became unstoppable (Hulk, Skaar and Thor; a very short list).
- Now Colossus has been imbued with the power of Cytorrak. If the previous power increase is any indication, he is a far more powerful being than Cain Marko ever was. He has held his own against the Red Hulk and fought against the Worthy during the Fear Itself story line.
Colossus the Juggernaut bringing the pain to Kuurth, Breaker of Stone during Fear Itself.
- For all intents and purposes his physical form should allow him to channel more energy from the Crimson Cosmos, giving him access to limitless physical strength. Cytorrak, even when offered a chance to remove his power from Colossus while he was possessed by the Phoenix force (which everyone expected him to do) Cytorrak refused indicating Colossus’ suitability as his avatar far exceeded anyone who has ever held the title.
Cytorrak on his throne in the Crimson Cosmos, his personal dimension.
I would expect Colossus’ power now exceeds the physical strength, stamina, durability and invulnerability of all but the near-cosmic level entities such as Thor, Gladiator, the Green and Red Hulks or cosmic beings such as the Sentry, the All-father Odin or the Heralds of Galactus.