Superman

He is known for collecting souvenirs. of his adventures and life housed within the Fortress of Solitude, and has even been known to have wax statues of all his friends there.

Story - Return to Krypton

While traveling in outer space, Superman finds himself meets Superboy and Supergirl. The three encounter the Oracle, who explains that H'El, survived their previous encounter, and has brought Krypton back to life. However, H'El also altered the timeline and they must stop him from destroying the universe. With the help of Faora, who is now Oracle's servant, the three heroes travel to different points in Krypton's history to stop H'El's plans. Superman travels to the city of Kryptonopolis a few months before the destruction of Krypton, where he meets his mother Lara.

Story - Forever Evil

The crime syndicate imprisons the Justice Leagues within the Firestorm Matrix, which psychologically places them in situations that represent their greatest failures. Superman is put in a situation where he tries to stop the accidental murder of Doctor Light over and over again. The Martian Manhunter, who has arrived there to help his companions, tries to get him out of this cycle but Superman just ignores him.

Superman has total immunity to almost all forms of damage and disease, including extreme force and extremely high temperatures. The reason for this is because Superman possesses a superdense molecular structure and a supercharged bio-electric "aura" that acts as an invisible "force field" around his body within a few millimeters of his skin. The proximity of this field to his skin means that loose clothing, for example, can be burned or damaged, while clothing that is tight to his body is protected by the "aura" it emits; This phenomenon is sometimes cited as the reason why Superman wears a tight suit. His invulnerability has allowed him to resist Darkseid's omega vision, a feat thought impossible. Superman has also withstood literal supernovas, and supernovas are millions of times more powerful than the sun and to destroy the sun according to calculations it takes 3,000,000,000 times the energy needed to destroy the Earth and with that you get the idea of the resistance of the Kryptonian who, in addition to that, can also hit with the force of a stellar explosion. However, the few times Superman needed medical attention, resistance to damage complicated the procedures needed to heal him, such as surgery. For example, when he was shot by a Kryptonite bullet, the surgeon was forced to expose him to the mineral to weaken his skin enough to make the incisions necessary to remove the bullet fragments. In some versions, this power slows his growth and increases as he ages, so he was sometimes considered immortal (in the epilogue of "The Kingdom Come" the hero is seen 1000 years later). In another DC version he manages to live until the 853rd century as a virtual deity.

For him, they are the barriers that They allow him to be human enough to live a normal life, and only sometimes release one of these limitations in fighting a particularly powerful opponent or in accomplishing a predominantly difficult task.