Most played cards in Delirium:

1 Decks
Winding Constrictor
4 copies - 4 average
Kitesail Freebooter
4 copies - 4 average
Blooming Marsh
4 copies - 4 average
Walking Ballista
4 copies - 4 average
Verdurous Gearhulk
4 copies - 4 average
Ripjaw Raptor
4 copies - 4 average
Fatal Push
4 copies - 4 average
Duress
4 copies - 4 average
Vraska's Contempt
3 copies - 3 average
Ranging Raptors
3 copies - 3 average
Gonti, Lord of Luxury
2 copies - 2 average
Lifecrafter's Bestiary
2 copies - 2 average
Skysovereign, Consul Flagship
2 copies - 2 average
Yahenni's Expertise
2 copies - 2 average
Aethersphere Harvester
2 copies - 2 average
Rishkar, Peema Renegade
2 copies - 2 average
Blossoming Defense
2 copies - 2 average
Evolving Wilds
2 copies - 2 average
Savage Stomp
2 copies - 2 average
Foul Orchard
2 copies - 2 average