Most played cards in Drain Tendrils:

2 Decks
Accumulated Knowledge
8 copies – 4 avg
Mana Drain
8 copies – 4 avg
Brainstorm
8 copies – 4 avg
Burning Wish
8 copies – 4 avg
Force of Will
8 copies – 4 avg
Duress
8 copies – 4 avg
Flooded Strand
6 copies – 3 avg
Polluted Delta
6 copies – 3 avg
Intuition
6 copies – 3 avg
Underground Sea
5 copies – 2.5 avg
Rack and Ruin
4 copies – 2 avg
Volcanic Island
4 copies – 2 avg
Innocent Blood
2 copies – 1 avg
Lava Dart
2 copies – 1 avg
Meltdown
2 copies – 1 avg
Pyroclasm
2 copies – 1 avg
Hurkyl's Recall
2 copies – 1 avg
Deep Analysis
2 copies – 1 avg
Coffin Purge
2 copies – 1 avg
Tolarian Academy
2 copies – 1 avg