Cast Traumatize by paying {3}{U}{U}, causing target opponent with an even library size to mill their entire library.

Infinite mill for target opponent

Bruvac the Grandiloquent

Traumatize

Cast Traumatize by paying {3}{U}{U}, causing the opponent enchanted by Fraying Sanity to mill cards equal to half their library size, rounded down.
At the beginning of your end step, Fraying Sanity triggers, causing the opponent to mill cards equal to the number of cards put into their graveyard this turn.

Combos with "Traumatize"