The owner of this deck hasn't added a sideboard, they probably should...
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Honestly new player and I discovered Door to Nothingness and remembered a few games with my u/b control deck that ran Macar with Akroan Horse and how much tokens(from both Macar and Horse) I had in those games and could drop any of my 7 cost win conditions while tapped out.
Honestly don't unless you can fix the mana base since most of the spells are blue and its 5 colors. This deck focus on Macar with Akroan Horse as fuel factory and either Door to Nothingness or Progenitus. Hopefully get Macar swinging and untapping to get you gold and ramp to either activate Door sooner or get out Progenitus .
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