Who is the Silver Surfer?

The Silver Surfer is a powerful cosmic being and the former herald of the Entity known as Galactus.  He was born Norrin Radd on the planet Zenn-La, part of an extremely long-lived and technologically advanced humanoid race which had created a worldwide utopia devoid of crime, disease, hunger, poverty, and want of any kind.

Zenn-La was threatened by the entity Galactus who has come to consume the planets resources. A process that would destroy the planet. Norin was a able to strike a deal with Galactus. In exchange for his planets safety he would serve Galactus as his herald. His primary obligation was finding new planets for Galactus to consume.

In order to properly perform his duties, Galactus tranformed Rand body, making him more suited to the rigors of deep space travel. He imbued him with comic power and equip him with a surfboard capable of of near light speed travel. He also erased his memory and implanet his new mission into his subconscious.

The Surfer served Galactus well for several decades  (likely almost 100 years), enjoying exploring the wonders of the universe; however, it became increasingly difficult for Radd to find energy-rich worlds devoid of sentient life.

The destruction of the first inhabited planet he offered to Galactus almost drove Norrin insane, forcing Galactus to alter the mind of his herald, submerging Radd’s emotions and repressing past memories. As a result, the Surfer became much more willing to lead Galactus to inhabited worlds, such as Earth. Locating Earth despite Uatu the Watcher’s covert attempts to ward him off, the Surfer caused widespread panic and fought the Fantastic Four. During this conflict, the Surfer met blind sculptress Alicia Masters, who sensed his inner nobility and pleaded with him to spare humanity.

His long-dormant emotions stirred by Alicia’s beauty and spirit, the Surfer turned on Galactus  and helped fight him off long enough for Uatu and the Fantastic Four to secure the Ultimate Nullifier, a cosmic doomsday weapon which forced Galactus to withdraw; however, Galactus punished the Surfer by trapping him on Earth, erecting a cosmic energy barrier around the planet that was uniquely attuned to the Surfer.

The Defenders
The Surfer formed a temporary alliance with the Hulk and Namor the Sub-Mariner to oppose a new weather technology that threatened to destroy the world.

He  became one of the Defenders’ earliest recruits, aiding the team against foes such as the Nameless One, Attuma and the Red Ghost. At one point, a quest to restore the petrified Black Knight (Dane Whitman) led the Defenders into a conflict with the Avengers orchestrated by Loki and Dormammu. In the end, the villains were defeated and the two super-teams parted as friends, though the restless Surfer soon left the active Defenders ranks.

He eventually escaped his exile on Earth and has since returned to a prominent role in the cosmos.

Currently, the Silver Surfer is one of the most powerful beings in the universe, and the most powerful of the Heralds of Galactus. He was deemed to be an Alpha Plus by the Galadorian Spaceknight Ikon. , and a potentially be an universal-level threat by the Nova Corps.

Thanks to Galactus, he possesses the following abilities:

The Power Cosmic: The Silver Surfer possesses the Power Cosmic, which is the core from which his other abilities manifest from. This power was granted to him by Galactus, and amplified during Annihilation.

Energy Absorption and Manipulation: The absorption of electromagnetic energy is the base of the Surfer’s life and power. The Surfer has complete control of the four fundamental forces of the universe, reaching nearly any effect he desires. As a result, the Surfer can absorb, manipulate and discharge energy of the entire electromagnetic spectrum at incredible levels surpassing Nova with the Nova Force and Quasar, and with sufficient destructive force to destroy planets.  Currently, at maximum, his beams are capable of almost killing Ravenous, equaling Thanos, and hurting Thor in Asgardian armor. Additional abilities include erecting force fields, phasing through solid matter, accelerating the evolution of lifeforms on a planet-wide scale, seeing the past by peeling back the layers of time, time travel, trans dimensional travel, bestowing limited cosmic powers to others, telepathically reading minds, casting illusions, and emphatically influencing human emotion and sensation.

The Surfer also possesses the ability to suppress or absorb the powers of other mutants/beings, making them temporarily or permanently unable to use them, like he did once with the Hulk.

He can heal living beings, even if they are near-death.He cannot, however, raise the dead.

Matter Manipulation: The Silver Surfer can rearrange matter to create other objects of importance by rearranging molecules. He can also change the state of matter, such as changing solids into gas.

Superhuman Physical Abilities:
Superhuman Strength: The Surfer possesses enormous superhuman strength. Though the exact magnitude remains vague, he has often been shown to fight evenly with people who can lift far in excess of 100 tons. He can also use the Power Cosmic to increase his strength to incalculable levels.

Invulnerability: The Silver Surfer’s silvery “skin” was designed to withstand the rigors of deep-space travel, and has proven to be virtually indestructible. The Silver Surfer can withstand even the most extreme conditions, like the crushing pressures of a black hole.

Godlike Stamina: musculature generates no fatigue toxins, or body stress,  granting him inexhaustible physical stamina,

The Silver Surfer can travel at speeds faster than light. He can enter the Hyperspace when he exceeds the speed of light,
Cosmic Senses: The Silver Surfer has certain cosmic-energy enhanced perceptions which enable him, through concentration, to become aware of the patterns of energy anywhere in the world.

Cosmic Self-Sustenance: life-maintaining cosmic energy directly through his skin.
Due to his ability to sustain himself, the Silver Surfer is virtually immortal.

When flying, the Silver Surfer uses a construct which resembles an earthly surfboard. This “board” is made with the same silvery material (The Galactic Glaze) that composes the Surfer’s body, thus making the board indestructible. Few forces aside from the power cosmic itself can affect it, and if it is somehow damaged, the Surfer can easily repair it in an instant.  The board is psionically linked with the Surfer’s mind in some unknown fashion, and it follows his commands instantly.