Most played cards in B/W Control:

5 Decks
Distress
20 copies - 4 average
Cranial Extraction
18 copies - 3.6 average
Hero's Demise
16 copies - 3.2 average
Final Judgment
16 copies - 3.2 average
Journeyer's Kite
16 copies - 3.2 average
Terashi's Grasp
15 copies - 3 average
Sensei's Divining Top
14 copies - 2.8 average
Tendo Ice Bridge
14 copies - 2.8 average
Hideous Laughter
12 copies - 2.4 average
Sickening Shoal
12 copies - 2.4 average
Yukora, the Prisoner
12 copies - 2.4 average
Ghostly Prison
11 copies - 2.2 average
Night of Souls' Betrayal
11 copies - 2.2 average
Ink-Eyes, Servant of Oni
9 copies - 1.8 average
Nezumi Graverobber
8 copies - 1.6 average
8 copies - 1.6 average
Nezumi Shortfang
6 copies - 1.2 average
Kagemaro, First to Suffer
6 copies - 1.2 average
Shizo, Death's Storehouse
6 copies - 1.2 average
Genju of the Fens
5 copies - 1 average