Color Identity: U

Initial Card State
- Riverchurn Monument and Fleet Swallower on the battlefield.
Notable Prerequisites
- Fleet Swallower does not have summoning sickness.
- You have not activated Riverchurn Monument's exhaust ability.
Mana Needed
- ({2} magic symbol)
({U} magic symbol)
({U} magic symbol)
available.
Steps
- Declare Fleet Swallower as an attacker, triggering its ability, causing a player to mill half their library, rounded up.
- Activate Riverchurn Monument's exhaust ability by paying ({2} magic symbol)
({U} magic symbol)
({U} magic symbol)
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.
Results
- Infinite mill for target opponent.
Bracket Tag
This combo has been estimated to be Spicy (Bracket 3-4+).