the wincon is to get enough power with mask to play a Mournful Deathcap and A New Tomorrow . By the time you can do this your opponent is most likely below 60 cards so you either play 2 deathcaps or you search a Solitude . Because of all the crests you can easily search for solitude.
I just trew two new cards in a Mask shell so any sugestions are welcome.
The ShiftstonedEternal Power Calculator is a deck-building tool that visualizes your odds of drawing enough Influence and Power based specifically on the cards found in your deck.