Most played cards in Mill:

4 Decks
Merfolk Windrobber
16 copies - 4 average
Drown in the Loch
16 copies - 4 average
Thieves' Guild Enforcer
16 copies - 4 average
Ruin Crab
16 copies - 4 average
Soaring Thought-Thief
16 copies - 4 average
Into the Story
15 copies - 3.75 average
Mystical Dispute
13 copies - 3.25 average
Agadeem's Awakening
12 copies - 3 average
Lullmage's Domination
11 copies - 2.75 average
Heartless Act
11 copies - 2.75 average
Call of the Death-Dweller
11 copies - 2.75 average
Thieving Skydiver
8 copies - 2 average
Cling to Dust
8 copies - 2 average
Bloodchief's Thirst
8 copies - 2 average
Negate
6 copies - 1.5 average
Eliminate
5 copies - 1.25 average
Anticognition
5 copies - 1.25 average
Lurrus of the Dream-Den
4 copies - 1 average
Soul-Guide Lantern
4 copies - 1 average
Jwari Disruption
3 copies - 0.75 average