Fleet Swallower + Fraying Sanity

U identity

Commander legal

The 2 combo pieces

What must be in place

Fleet Swallower does not have summoning sickness.
Fraying Sanity is attached to an opponent.

How to execute it

  1. Declare Fleet Swallower as an attacker.
  2. Fleet Swallower triggers, causing the opponent enchanted by Fraying Sanity to mill cards equal to half their library size, rounded up.
  3. 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.

What the combo produces