Keening Stone + Terisian Mindbreaker

Mana needed: {5}

U identity

Commander legal

The 2 combo pieces

• Keening Stone
• Terisian Mindbreaker

How to execute it

1. Declare Terisian Mindbreaker as an attacker, triggering its ability, causing the defending player to mill half their library, rounded up.
2. Activate Keening Stone by paying {5} 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.

What the combo produces

• Infinite mill for target opponent