Iceberg lost his hand in a mission. The loss of the hand began a metamorphosis that placed him within an ice coccoon.
Iceberg was created by Suicide Squad writer Adam Glass who revealed during an interview the character was developed with the help of his son.
Powers and Abilities
Cryokinesis: Iceberg has control over ice, and a very strong one at that. He was able to freeze a Basilisk soldier in under a second, preventing him from executing a suicide bomb attack.
Gifted Intelligence: Mentions to have worked as a professor prior to joining the Suicide Squad. He stated that he is also fluent in 7 languages, including English and Spanish, but he was able to determine that the inhabitants of the island were Mayan just by listening to them speak.