Most played cards in Erayo, Soratami Ascendant:

2 Decks
Snow-Covered Island
19 copies - 9.5 average
Preordain
2 copies - 1 average
Ponder
2 copies - 1 average
Sleight of Hand
2 copies - 1 average
Snap
2 copies - 1 average
Spell Snare
2 copies - 1 average
Mystic Confluence
2 copies - 1 average
Miscalculation
2 copies - 1 average
Impulse
2 copies - 1 average
Gush
2 copies - 1 average
Mana Leak
2 copies - 1 average
Mental Misstep
2 copies - 1 average
Everflowing Chalice
2 copies - 1 average
Muddle the Mixture
2 copies - 1 average
Ancient Tomb
2 copies - 1 average
Treachery
2 copies - 1 average
Sapphire Medallion
2 copies - 1 average
Urza's Bauble
2 copies - 1 average
Vedalken Shackles
2 copies - 1 average
Winter Orb
2 copies - 1 average