Colton O'Neil

Colton O'Neil was the twin brother of Hunter Bradley, younger half-brother of Amanda O'Neil, and the son of the late Barry O'Neil and the late Samantha Bradley. Growing up with his father and older sister, Colton became the vigilante known as Arsenal, a mantle later taken by his brother. However, he was supposedly killed by Deathshot.

However, it was revealed that he was not killed and had been loyal to The Hierarchy all along, under the name Sentinel. Leaving the Higher Institute, Colton sought the Anarchy Spear in order to change history and rule the world, creating Anarchy Spear in order to kill the opposing Legends. After succeeding in his mission, he unleashed Prometheus. Engaging the Legends, Colton gained the upper hand on Hunter and upon the intervention of the Alpha Rangers, Hunter painfully kills Colton.