Tolarian Contempt - March of the Machine: The Aftermath - 58

Enchantment

Mana Cost: {3}{U}{U}

When this enchantment enters, put a rejection counter on each creature your opponents control.
At the beginning of your end step, for each opponent, choose up to one target creature they control with a rejection counter on it. That creature's owner puts it on their choice of the top or bottom of their library.

Uncommon · March of the Machine: The Aftermath · #58 (MAT)

Illustrated by Eshpur