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This deck is for upcoming Theros block in september.
The Archdemon of Unx is a place holder for Abhorrent Overlord coming in Theros. It is a 6/6 Flyer with the ability to bring 1/1 flyers when it comes in equal to the number of black mana symbols in permanents you control, you also have to sacrifice a creature in the beginning of your upkeep if its in play, it costs five colorless mana and two black mana. Thoughtseize is being reprinted in Theros so I included that too.
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