Most played cards in Eureka:

5 Decks
Birds of Paradise
20 copies – 4 avg
Triskelion
20 copies – 4 avg
Eureka
20 copies – 4 avg
Shivan Dragon
19 copies – 3.8 avg
City of Brass
19 copies – 3.8 avg
Erhnam Djinn
16 copies – 3.2 avg
Taiga
16 copies – 3.2 avg
Red Elemental Blast
15 copies – 3 avg
Sylvan Library
11 copies – 2.2 avg
Tropical Island
11 copies – 2.2 avg
Bayou
10 copies – 2 avg
Blue Elemental Blast
9 copies – 1.8 avg
Earthquake
8 copies – 1.6 avg
Mana Vault
6 copies – 1.2 avg
Fellwar Stone
6 copies – 1.2 avg
Concordant Crossroads
6 copies – 1.2 avg
Mahamoti Djinn
6 copies – 1.2 avg
Llanowar Elves
5 copies – 1 avg
Clone
4 copies – 0.8 avg
Disenchant
4 copies – 0.8 avg