Fleet Swallower + Riverchurn Monument

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

U identity

Commander legal

The 2 combo pieces

What must be in place

Fleet Swallower does not have summoning sickness.
You have not activated Riverchurn Monument's exhaust ability.

How to execute it

  1. Declare Fleet Swallower as an attacker, triggering its ability, causing a player to mill half their library, rounded up.
  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, thus causing the player targeted by Fleet Swallower's ability to mill the remainder of their library.

What the combo produces