The gist of this deck is Vivien and Mephistopheles. You want to get these two out as soon as possible for the deck to work.

So first, you get Vivien out. She copies Imposters ability to banish an avatar and get their abilities. Do that to make Vivien a Corruptor.

Next you want to Mephistopheles your Imposter.

Now you have Vivien as a Corruptor, which means all your mortals are undead, therefore evil. And you have Mephistopheles who can summon evil minions for free. Remember that Vivien also has Mephistopheles' abilities, so she can also summon evil minions for free. So you get two free minions each turn.

And that's Vivien's Facade.

This deck is in no way functional lol, but it can be very fun if you can actually get it going. Enjoy!

P.S. Pact with the Devil is mostly just for flavour.