History
The Kaiju Serum was accidentally created when a dead test subject for the Kaiju Formula was exposed to S.H.I.E.L.D. Helicarrier fuel waste.[1] April Manning discovered its existence and secured it for himself to become the new U.S.Agent.[2] Kate Walker, U.S.Agent's sister, who had become psychotic due to the exposure to fuel cells seduced Manning and acquired the serum for herself.[2]
Properties
The serum temporarily enhances the user's physical abilities to superhuman levels comparable to those of U.S.Agent and Battlestar but causes several side effects: it turns the user's blood a shade of bright blue, can kill if used too often and recodes the user's DNA.[1]