Most played cards in Cascade LD:

3 Decks
Fulminator Mage
12 copies - 4 average
Vivid Creek
12 copies - 4 average
Sunken Ruins
12 copies - 4 average
Reflecting Pool
12 copies - 4 average
Rain of Tears
12 copies - 4 average
Cryptic Command
12 copies - 4 average
Boomerang
12 copies - 4 average
Bloodbraid Elf
12 copies - 4 average
Enlisted Wurm
10 copies - 3.33 average
Deny Reality
8 copies - 2.67 average
8 copies - 2.67 average
Volcanic Fallout
8 copies - 2.67 average
Vivid Marsh
7 copies - 2.33 average
Cascade Bluffs
7 copies - 2.33 average
Vivid Grove
6 copies - 2 average
Flooded Grove
6 copies - 2 average
Primal Command
5 copies - 1.67 average
Grixis Charm
4 copies - 1.33 average
Plumeveil
4 copies - 1.33 average
Mulldrifter
4 copies - 1.33 average