Most played cards in Ad Nauseam Tendrils:

1 Decks
Scalding Tarn
4 copies - 4 average
Remand
4 copies - 4 average
Baral, Chief of Compliance
4 copies - 4 average
Serum Visions
4 copies - 4 average
Sleight of Hand
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Spirebluff Canal
4 copies - 4 average
Manamorphose
4 copies - 4 average
Pyretic Ritual
4 copies - 4 average
Gifts Ungiven
4 copies - 4 average
Desperate Ritual
4 copies - 4 average
Goblin Electromancer
4 copies - 4 average
Dispel
3 copies - 3 average
Empty the Warrens
3 copies - 3 average
Grapeshot
3 copies - 3 average
Past in Flames
2 copies - 2 average
Pieces of the Puzzle
2 copies - 2 average
Misty Rainforest
2 copies - 2 average
Dismember
2 copies - 2 average
Steam Vents
2 copies - 2 average