Alex Brock was the brother of Eddie Brock aka venom, he even had his own symbiote named cardiac arrest, they both went to atlas academy together, but one day a dust explosion went off and the blast of mixed fire,ice,electric and energy dust hit Alex, but the blast also fuses cardiac arrest and Alex making the symbiote metaphorically die and lose its consciousness while making Alex a now human/klyntar hybrid (meaning he is now half human and half venom), after the accident the Brock siblings transfer to beacon