Most played cards in Delirium Ramp:

1 Decks
Vessel of Nascency
4 copies - 4 average
Kozilek's Return
4 copies - 4 average
Traverse the Ulvenwald
4 copies - 4 average
Grapple with the Past
4 copies - 4 average
Game Trail
4 copies - 4 average
Nissa's Pilgrimage
4 copies - 4 average
Fiery Impulse
3 copies - 3 average
Rending Volley
3 copies - 3 average
Gather the Pack
2 copies - 2 average
Gnarlwood Dryad
2 copies - 2 average
Tireless Tracker
2 copies - 2 average
Greenwarden of Murasa
2 copies - 2 average
Hedron Archive
2 copies - 2 average
World Breaker
2 copies - 2 average
Emrakul, the Promised End
2 copies - 2 average
Shrine of the Forsaken Gods
2 copies - 2 average
Drownyard Temple
2 copies - 2 average
Hedron Crawler
2 copies - 2 average
Dragonlord Atarka
2 copies - 2 average
Ishkanah, Grafwidow
2 copies - 2 average