Most played cards in Skullbriar, the Walking Grave:

4 Decks
Snow-Covered Forest
5 copies - 1.25 average
Snow-Covered Swamp
5 copies - 1.25 average
Thoughtseize
4 copies - 1 average
Twilight Mire
4 copies - 1 average
Demonic Tutor
4 copies - 1 average
Verdant Catacombs
4 copies - 1 average
Wasteland
4 copies - 1 average
Deathrite Shaman
4 copies - 1 average
Go for the Throat
4 copies - 1 average
Inquisition of Kozilek
4 copies - 1 average
Woodland Cemetery
4 copies - 1 average
Maelstrom Pulse
4 copies - 1 average
Wooded Foothills
4 copies - 1 average
Liliana of the Veil
4 copies - 1 average
Umezawa's Jitte
4 copies - 1 average
Command Tower
4 copies - 1 average
Cavern of Souls
4 copies - 1 average
Blooming Marsh
4 copies - 1 average
Bloodstained Mire
4 copies - 1 average
Llanowar Wastes
4 copies - 1 average