Even without synergies, Oblivion is a passable card. It shines when paired with payoffs for applying Debuffs or Doom, or with ways to spam lots of cards in a turn (like Souls).
A huge payoff for any deck that can spam a lot of cards. Best with lots of Souls to both draw into this as well as activate it. Each card played will activate Shroud and Sleight of Flesh.
Gain. Draw 2 cards. At the start of your turn, apply 3 Doom to yourself.
Apply 10 Doom, plus an additional 5 Doom for every 10 Doom already on this enemy.
Whenever you play a card this turn, apply 3 Doom to the enemy.
