missing card

I pulled Maarika, Brutal Gladiator from my Phyrexia: All Will Be One set booster but that card doesn't seem to exist on the site?

here is the card elsewhere, it says it's from Universes Within, but I didn't see it listed on here when i went searching manually either.

https://scryfall.com/card/slx/15/maarik … -gladiator

thanks!