Who is the imposter?

This is a bad version of a Quest Rogue that tries to constantly throw your opponent off by using Maestra of the Masquerade to mess with their opening hand and a small secret package to constantly have them questioning what your actual cards played are. You also have C'Thun, the Shattered as a spicy win condition that also leaves them wondering "Hmm, THAT class is playing C'Thun? How odd..." at the start of the game.

Don't wait with your Quest, it's okay to leave your disguise turn 1, as the main purpose of Maestra of the Masquerade is just to mess with their mulligan. You will gain nothing from losing additional tempo in the game itself. Your Quest is your main way of getting at least some power plays, as your deck lacks that otherwise.

Your plan is to play defensively and have them play around your secrets, making them lose a lot of tempo in the mean time. You can use Secret Passage and Cornelius Roame to reach your C'thun pieces faster as you can only "win" with a well timed C'Thun, the Shattered.

DISCLAIMER: This is just for fun, don't expect to ever win a game beyond bronze 10, but I think it can be a lot of fun for casual games to constantly mess with your opponents head.