Sunday challenge first place: Even dark heart

Won the ecl sunday challenge today with this.
Round 1 2-0 stonescar midrange
Round 2 2-0 stonescar aggro
Round 3 2-1 stonescar aggro
Round 4 0-2 vs xenan even (mask drain combo)

Deck feels great vs the saturday ets top 8 meta decks which is what i expected to see lots of today. The even engine is a very powerfull draw engine. I played devotee of the sands and quarry to close the gap between 2 and 4 drops. Other than that the deck plays out like traditional greed pile. Did not play xo since i wasnt playing merchants and xo feels less powerfull not being able to market shuffle it. Your flex slots are lumen reclaimer, furnace mage and dissociate. Played lumen for the reanimator combos floating around and mages and diss are pretty self explanatory. Mystic felt underwhelming just not sure what i would replace it with.