system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Tony Stark ran into a crisis wherein the palladium core of his arc reactor was poisoning his body. Why not replace it with a low-tech alternative instead? Even a magnet connected to a car battery was initially effective.
gpt
He used it as a fail-safe to prevent the reverse-engineering of his suits.  Stark is convinced at the beginning of Iron Man 2 that he has a monopoly on his arc-reactor technology, the only thing that can keep his suit sufficiently powered.  Only Rhodes and Potts have access to a spare.  So he'll tolerate being poisoned as long as it means he's the only super-powered individual during his lifetime.

But then Whiplash comes along and throws a wrench in the works.