Powers/abilities
Doomsday
Doomsday was created and evolved through cloning an infant and having it killed over and over again by one of the most dangerous species of the universe and in one of the harshest habitats in existence, prehistoric Krypton. As such, he returns to life every time he dies and becomes resistant or immune to what killed him before. An example of this was how Doomsday was immune to the Radiant's energy after being killed by the Radiant the first time they fought. Also, Doomsday was shown to be extremely resilient to energy based attacks when facing Darkseid, even going so far as to brutally attack the Lord of Apokolips who had unleashed the force of his omega beams on Doomsday at point blank range. The amount of damage dealt to Doomsday determines the length of time it would take to fully recover. If Doomsday was barely killed with minimal damage, his recovery could be as little as a few months; if he was extensively damaged (like when Imperiex reduced him to a skeleton), it could take even thousands of years without assistance.
Doomsday can also develop/evolve resistances to whatever injures or harms him, which was demonstrated in the Superman/Doomsday: Hunter/Prey series. His shield is among the strongest in the universe. Superman used a sound gun to paralyze Doomsday, but Doomsday's auditory canals simply closed up making him impervious to Superman's weapon. Waverider paralyzed Doomsday once with chronal energy, but the second attempt backlashed on Waverider. In essence, Doomsday can become as invulnerable as he needs to be.
Doomsday can also develop weapons/evolutions to counter an opponent such as the case when he cancelled out a being of pure energy (i.e. Radiant) by generating an aura of energy and slamming into him, extending his claws to strike while Superman was in flight and reel him in while slowly poisoning him in the aforementioned Superman/Doomsday: Hunter/Prey or breathe flames against the Martian Manhunter in Superman #175.
As a result of these evolutions, Doomsday is covered by bony protrusions all through out his body that serves as added protection for what few vital organs he has (brain, eyes, heart, nervous system) and as weapons (in the form of claws, fangs, and elbow/knee spurs).
Doomsday also has a highly accelerated healing factor that allows him to heal and regenerate from most damage almost instantly. Similar to Superman's Kryptonian DNA, Doomsday absorbs and processes solar radiation and can store it for thousands of years. As a result of his engineering, Doomsday does not need to eat, drink, breathe, or sleep and his body is almost solid mass.
Doomsday possesses super strength; considerably more than Superman under normal circumstances. In the Superman/Doomsday: Hunter/Prey mini series, he was able to break Superman's left arm even though Superman was at that time experiencing a massive energy surge which was making him stronger and pushing him closer to invulnerability. His other abilities include extreme resistance to heat, cold, and injury allowing him to survive on the most inhospitable worlds as well as survive in the vacuum of space. Doomsday possesses almost inexhaustible stamina. Superman once remarked on Doomsday, "We've been fighting all day and Doomsday doesn't seem to have slowed down". Most surprising are his reflexes and speed for his size. In a matter of seconds, Doomsday managed to render most of the Justice League incapable of fighting. He cannot fly, but rather travels by leaping miles at a time, similar to the Hulk. Superman took advantage of this in their first battle by trying to keep him airborne. He also used it to his advantage when he deposited Doomsday in a lake to slow him down, while Superman saved a mother and her child from a burning house.
Weaknesses
Reducing Doomsday's body to the sub-atomic level and then scattering these particles across time and space is sufficient to prevent him regenerating. In Superman/Doomsday: Hunter/Prey, Superman and Waverider took advantage of this fact and sent Doomsday to the End of Time, where Doomsday ́s particles would never regroup again.[citation needed]
Juggernaught
Because of his association with the X-Men, Juggernaut is often mistakenly labeled a mutant. Juggernaut is considered a mutate, a normal human that was changed by the Ruby of Cyttorak. The ruby bonded to his soul and altered his being, giving him powers exceeding those of most 'Homo Superior.' The ruby is the root of his power, not genetic evolution.
Juggernaut traditionally possessed vast power of mystical origin. He had tremendous strength (which surpassed the Hulk's strength in his calm state), a total resistance to physical injury due to his mystic spell of invulnerability; an impenetrable force field that he could summon at will and unlimited stamina. His spell also granted him unbreakable skin, therefore making his forcefield an added protection in case he did not wish for a certain attack to touch his physical body. Due to the mystical energies flowing through his body, he did not need to eat, breathe or drink fluids. As a vessel of mystic energy, he also possessed many abstract powers that had yet to be fully revealed. Finally, while moving he was, essentially, unstoppable, except in the most extreme cases such as when Thor united his godly power with his magical hammer and fired a concentrated beam at Juggernaut (Juggernaut did not force ahead again before the ground collapsed underneath them), the psychic being Onslaught, and perhaps sufficient strength of celestial technology, as the Hulk (War Hulk at the time) was able to physically stop the Juggernaut while he was running. (This technology was given by Apocalypse.)
Juggernaut flayed down to a skeletonTo compensate for his most significant vulnerability — to telepathic assault — he also wore a helmet, and sometimes also a skullcap, of a mystical alloy which prevented his mind from being read or attacked by any type of telepathic means.
art by fear-sAs
