Phenax, God of Deception + Sewer Nemesis + Lord Xander, the Collector

Phenax, God of Deception

Sewer Nemesis

Lord Xander, the Collector

How it works

1. Declare Lord Xander as an attacker attacking the opponent named by Sewer Nemesis. Lord Xander's second ability triggers, causing the opponent to mill half their library, rounded up.
2. Activate Sewer Nemesis by tapping it, causing the opponent to mill cards equal to the cards in their graveyard, milling the remainder of their library.