Most played cards in Yidris, Maelstrom Wielder:

4 Decks
Wooded Foothills
3 copies - 0.75 average
Eternal Witness
3 copies - 0.75 average
Demonic Tutor
3 copies - 0.75 average
Scavenging Ooze
3 copies - 0.75 average
Windswept Heath
3 copies - 0.75 average
Watery Grave
3 copies - 0.75 average
Umezawa's Jitte
3 copies - 0.75 average
Verdant Catacombs
3 copies - 0.75 average
Volcanic Island
3 copies - 0.75 average
Ponder
3 copies - 0.75 average
Arid Mesa
3 copies - 0.75 average
Ancestral Vision
3 copies - 0.75 average
Brainstorm
3 copies - 0.75 average
Jace, the Mind Sculptor
3 copies - 0.75 average
Abrupt Decay
3 copies - 0.75 average
Go for the Throat
3 copies - 0.75 average
Murderous Cut
3 copies - 0.75 average
Underground Sea
3 copies - 0.75 average
Lightning Bolt
3 copies - 0.75 average
Liliana of the Veil
3 copies - 0.75 average