system
Given the following post, respond as if you're commenting on Reddit:
human
[DC/Marvel] Why aren't magic-users the "Ace-in-the-hole" against strong bad guys like Thanos, Darkseid, Doomsday?

If Superman is getting his face bashed in by Darkseid, can't Zatanna just say "Nrut dieskrad otni ynnub" and Darkseid is instantly immobilized as a furry bunny?
gpt
Sometimes they are ex: Wanda almost murked Thanos in End Game. Took an orbital bombardment to stop her.

But, these guys aren't at the top of their food chain for nothing. Firstly, they're often backed by armies, if not planets full of loyal people, quite often employing magic users of their own.

Secondly, many of them *are* magic users themselves or at least are resistant or have learned enough to deal with the odd ball mage.