Color Identity: U

Initial Card State
- Terisian Mindbreaker and Keening Stone on the battlefield (Terisian Mindbreaker without summoning sickness).
Mana Needed
- ({5} magic symbol)
available.
Steps
- Declare Terisian Mindbreaker as an attacker, triggering its ability, causing the defending player to mill half their library, rounded up.
- Activate Keening Stone by paying ({5} magic symbol)
and tapping it, causing the player to mill cards equal to the number of cards in their graveyard, thus milling the rest of their library.
Results
- Infinite mill for target opponent.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).