Most played cards in 4 Color Control:

1 Decks
Mortify
4 copies - 4 average
Overgrown Tomb
4 copies - 4 average
Carven Caryatid
4 copies - 4 average
Farseek
4 copies - 4 average
Loxodon Hierarch
4 copies - 4 average
Faith's Fetters
4 copies - 4 average
Civic Wayfinder
4 copies - 4 average
Dimir Guildmage
4 copies - 4 average
Putrefy
3 copies - 3 average
Temple Garden
3 copies - 3 average
Vitu-Ghazi, the City-Tree
3 copies - 3 average
Birds of Paradise
3 copies - 3 average
Grave-Shell Scarab
3 copies - 3 average
Helldozer
3 copies - 3 average
Debtors' Knell
3 copies - 3 average
Dimir Doppelganger
3 copies - 3 average
Watery Grave
2 copies - 2 average
Moratorium Stone
2 copies - 2 average
Godless Shrine
2 copies - 2 average
Plague Boiler
1 copies - 1 average