Who is Steppenwolf in DC Comics

This character first appeared back in 1972 in New Gods #7. He's a part of the weird worlds created by legendary artist and writer Jack Kirby. Without getting too heavy into what's called "Fourth World," Steppenwolf comes from the planet Apokolips, which is either at war with New Genesis or about to go to war with it. Think of Apokolips as the "bad" planet and New Genesis as the "good" planet or as Hell and Heaven. These planets contain super-powered beings called The New Gods. Most of them reside on New Genesis, under the rule of Highfather. A few who oppose Highfather live on Apokolips, under Darkseid's rule.
Steppenwolf is the uncle of Darkseid and one of his elite soldiers. He's a powerhouse character who borders on having omnipotent power. His laundry list of abilities includes superhuman strength, speed, reflexes, and senses. In addition, he's invulnerable, has immunity from diseases and toxins, and he's immortal. Saying he's going to be a challenge for the Justice League is the understatement of the century. In the thousands of years of his existence, he's mastered many forms of combat, and if that's not enough, he carries an electro-axe, which is as dangerous as it sounds.
Aside from his powers, Steppenwolf isn't the friendliest of characters. During the New 52 DC Universe, Steppenwolf tried to take over Earth-2 in Darkseid's name. The superheroes of Earth-2 were no match for the overpowered soldier. The battle almost seemed unfair. Eventually, as always, the heroes prevailed, in a way. Steppenwolf may have died in battle, but he accomplished his goal for at least a short time
Steppenwolf from Batman v Superman: Dawn of Justice
Source: ComicVine

This character first appeared back in 1972 in New Gods #7. He's a part of the weird worlds created by legendary artist and writer Jack Kirby. Without getting too heavy into what's called "Fourth World," Steppenwolf comes from the planet Apokolips, which is either at war with New Genesis or about to go to war with it. Think of Apokolips as the "bad" planet and New Genesis as the "good" planet or as Hell and Heaven. These planets contain super-powered beings called The New Gods. Most of them reside on New Genesis, under the rule of Highfather. A few who oppose Highfather live on Apokolips, under Darkseid's rule.
Steppenwolf is the uncle of Darkseid and one of his elite soldiers. He's a powerhouse character who borders on having omnipotent power. His laundry list of abilities includes superhuman strength, speed, reflexes, and senses. In addition, he's invulnerable, has immunity from diseases and toxins, and he's immortal. Saying he's going to be a challenge for the Justice League is the understatement of the century. In the thousands of years of his existence, he's mastered many forms of combat, and if that's not enough, he carries an electro-axe, which is as dangerous as it sounds.
Aside from his powers, Steppenwolf isn't the friendliest of characters. During the New 52 DC Universe, Steppenwolf tried to take over Earth-2 in Darkseid's name. The superheroes of Earth-2 were no match for the overpowered soldier. The battle almost seemed unfair. Eventually, as always, the heroes prevailed, in a way. Steppenwolf may have died in battle, but he accomplished his goal for at least a short time
Steppenwolf from Batman v Superman: Dawn of Justice
Source: ComicVine