What's a good Android game to play while I'm waiting for my stream to start that's actually kinda deep?

Yo, so I'm always lookin' for something to do while I'm waitin' for my stream to go live, right? Gotta keep the brain pumpin', ya feel? I stumbled on Cards, Universe & Everything and it hits different. It's a card game, but like, a big brain move by the devs. There are SO many cards, like thousands, and you gotta build decks that actually synergize. The art is kinda cool too, it's not all just the same anime stuff. Plus, and this is key, it doesn't hog my GPU. I can still have OBS running in the background without dropping frames, which is huge for pre-stream prep. And honestly, chat would probably dig watching me build decks, maybe even help me out. Community deck-building stream, anyone? I'm thinkin' this could be a new meta for my pre-stream routine, for real.