Lord Xander, the Collector + Riverchurn Monument

Mana needed: {2}{U}{U}

UBR identity

Commander legal

The 2 combo pieces

What must be in place

Lord Xander does not have summoning sickness.
You have not activated Riverchurn Monument's exhaust ability.

How to execute it

  1. Declare Lord Xander as an attacker, triggering its ability, causing an opponent to mill half their library, rounded down.
  2. Activate Riverchurn Monument's exhaust ability by paying {2}{U}{U} and tapping it, causing each player to mill cards equal to the number of cards in their graveyard.

What the combo produces