Waystone Wisp Control

Outlast the opponent and use Mysterious Waystone to win the game.
Eager Offering gets free sacrifice and card draw to start off the Mysterious Waystone snowball or gets some early card draw.
Lumen Attendant can be used to get back your Devour or Mysterious Waystone from the void. Soulbringer can be used to revive your Dark Wisp for some card draw.
Befoul can be used for some big units endgame or a blocker in the beginning.
Vara, Vengeance-Seeker is put in just for some extra removal and lifegain to survive the beginning.
Eremot's Designs is to be used against aggro.
Ephemeral wisp is a great piece for obvious reasons as it can come back turn after turn to be used as a blocker or a sacrificial unit.

Market:
Obrak, the Feaster is just in here for some sacrifice effects and a big flyer.
Induce Madness is great as you will be sacrificing many units and can put a stop to the opponent playing units.
Eremot's Machinations can be used to get back some units and can combo Nahid's Faithful with Dark Wisp and get back Eager Offering for 1 immediate card draw and a delayed 2 card draw your next turn
If you want to make changes to the market you are free to as the only necessary card is induce madness.
Ark of Sol is in market for power fix
Mysterious Waystone for obvious reasons

This deck is built around Mysterious Waystone to deter the opponent and hopefully finish them off as well as giving you a good source of life.
This is an experimental deck and comments are greatly appreciated if you spot ways to fine tune the deck.

EDIT:
Put Mysterious Waystone in market due to lack of consistency drawing it in games.
Added Flamebathe Restoration to fill in the gaps for Mysterious Waystone, can be replaced if you have a better option, exalted effect is nice but the sacrifice effect every turn is really why this is in here