Most played cards in Sigarda, Host of Herons:

2 Decks
Mother of Runes
2 copies - 1 average
Mirran Crusader
2 copies - 1 average
Qasali Pridemage
2 copies - 1 average
Reclamation Sage
2 copies - 1 average
Stoneforge Mystic
2 copies - 1 average
Llanowar Elves
2 copies - 1 average
Knight of the Reliquary
2 copies - 1 average
Eternal Witness
2 copies - 1 average
Elvish Mystic
2 copies - 1 average
Fyndhorn Elves
2 copies - 1 average
Gaddock Teeg
2 copies - 1 average
Grand Abolisher
2 copies - 1 average
Thrun, the Last Troll
2 copies - 1 average
Voice of Resurgence
2 copies - 1 average
Swords to Plowshares
2 copies - 1 average
Umezawa's Jitte
2 copies - 1 average
Unexpectedly Absent
2 copies - 1 average
Elspeth, Knight-Errant
2 copies - 1 average
Sword of Feast and Famine
2 copies - 1 average
Green Sun's Zenith
2 copies - 1 average