Mill
Empty your opponents' libraries instead of attacking them.
A player who has to draw from an empty library loses. Milling attacks that library directly, so nothing on the battlefield can block you and no amount of life matters. It is slow against three opponents holding a hundred cards each, so the deck wants effects that mill in bulk rather than a card at a time.
Not this one?
Leave empty for no limit. Cards you own do not count.
Commanders for Mill
Ordered by how often they are played, with the ones you own first.