Phenax, God of Deception + Sewer Nemesis + Fleet Swallower

Prerequisites

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Steps

1. 1Declare Fleet Swallower as an attacker, triggering it, causing the player named by Sewer Nemesis to mill half their library, rounded up.
2. 2Activate Sewer Nemesis by tapping it, causing the player to mill cards equal to the cards in their graveyard, milling the remainder of their library.

Effects

• Infinite mill for target opponent
• Infinite self-mill