Omniscience

Although omniscience can be a difficult card to play, it can also be completely game winning. The high energy cost means that in many cases you need to have an energy relic or have it upgraded in order to be able to play it. However, this is not much of a downside as usually you won't be able to find this card until act two. Omniscience is at its best when you have two copies in the deck: It allows you to more consistently draw an omniscience early, and omniscience can be played on the other copy of omniscience, actually allowing you to play TWO cards twice. This is an extremely powerful effect, especially when combined with sources of mantra, as you can often enter divinity on turn 1 using this strategy.