The Overseer

Indestructible, Hexproof, Vigilance, Deathtouch

Whenever an opponent draws their second card each turn, you may randomly exile a nonland card from their hand.
You may play these cards for as long as they remain exiled.

At the beginning of your end step, mill two cards. Then you may pay {1} for each card milled this way. For each {1} paid, draw a card and lose 1 life.

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"Let the games... Begin."