Bio and Origins

Here.

Powers and abilities (from wiki)

• Immortality: Like all of the Olympians, the First Born is seemingly immortal and has spent the last 7000 years digging himself out of the Earth, with presumably little to no nourishment.
• Superhuman Strength: The First Born has an unknown degree of superhuman strength, but has shown the ability to easily contend with heavy hitters like Wonder Woman and Orion at the same time. The First Born's strength appears to be so vast he can hold open a Boom tube portal, something that Orion had never seen before,but is something that only Darkseid have accomplished. He has also boasted that his blows has leveled mountains.
• Healing Factor: First Born possess a healing factor that enables him to regenerate damaged or destroyed tissue,bones and limbs. As shown when Apollo tortured and eaten his internal organ for several weeks.
• Superhuman Durability: So far the First Born has endured the pressure and temperature of the Earth's core and the chill of the Antarctic unaided and unbothered by the heat, cold and pressure. Apollos bloodlusted blasts.
• Blood Manipulation: After become king of Olympus showed that can manipulate blood and even use it as a portal.
• Absorption: A peculiar trait that allowed the First Born to learn modern English by eating the brain of a man. Shortly after taking the throne of Olympus his powers have developed to the point of being able to absorb life-force and powers from others through various tentacles in his body.
• Leadership: During his time on Earth First Born commanded an army of Hayena-men and also commanded an army of men through the centuries.

I have edited for what he has only displayed.

Keeps The Boom Tube Edge open

Defeats Orion

Beats Wonder Woman (Pre god of War)

vs Apollo

vs Artemis