Turning your win condition into self-mill, however, gives us access to some powerful spells

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This change was also implemented in the proper TCG, so it's not exactly unexpected
Victor, Valgavoth's Seneschal The leader of the Cult of Valgavoth is also known as the First Child of the All-Devouring Father
not only will your opponent be able to untap their creatures every time they have one enter the battlefield, but your creatures will not untap until you have one enter the battlefield