Keening Stone + Maddening Cacophony

Mana needed: {9}{U}{U}

U identity

Commander legal

The 2 combo pieces

• Keening Stone
• Maddening Cacophony

How to execute it

1. Cast Maddening Cacophony with kicker by paying {4}{U}{U}, causing each opponent to mill half their library, rounded up.
2. Activate Keening Stone by paying {5} and tapping it, causing an opponent 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
• Near-infinite mill