Superman #48 1990

In Superman #48, part of the "Savage Dawn" storyline, a depowered Superman seeks to regain his abilities by a desperate and risky plan: exposing himself to Kryptonite. He enlists Agent Steve Trevor to access A.R.G.U.S.'s Kryptonite reserves, believing it will cure his mutated cells. This pivotal issue features Superman making a fateful choice, all while the mechanized Puzzlerbot attacks A.R.G.U.S. to thwart his efforts, making it a key moment in his struggle to restore his powers.