Maddening Cacophony + Fraying Sanity

Maddening Cacophony

Fraying Sanity

How it works

1. Cast Maddening Cacophony with kicker by paying 4, causing each opponent to mill cards equal to half their library size, rounded up.
2. At the beginning of your end step, Fraying Sanity triggers, causing the opponent enchanted by Fraying Sanity to mill cards equal to the number of cards put into their graveyard this turn.

This elegant pairing achieves a devastating one-turn decimation of a single opponent's library by turning a massive single-shot milling into a game-ending avalanche. You begin by casting Maddening Cacophony with its kicker paid, instantly dumping half of your target opponent's library straight into their graveyard. Then, as your turn draws to a close, Fraying Sanity triggers during the end step to look back at everything that happened this turn—recognizing that the massive chunk of cards just milled represents X, and forcing the enchanted opponent to mill that exact same staggering number all over again, effectively obliterating whatever cards they had left.