>>531212927
Sky Striker, maybe? It's a blind 2nd deck so you have to learn where to handtrap meta decks or how to break meta boards (it can be built either handtrap-heavy or boardbreaker-heavy) and it stars a cute anime girl who fights with cool mecha armor. Right now it's only rogue tier, but it has upcoming support that will make it meta again in like half a year or so. Or if you want to win now, you can combine the Sky Striker spells with Tenpai Dragon monsters for a really good boardbreaker-focused blind 2nd deck.

I also agree with the other recommendations of Labrynth.