Most played cards in Enduring Renewal:

1 Decks
Telling Time
4 copies - 4 average
Steam Vents
4 copies - 4 average
Soul Warden
4 copies - 4 average
Think Twice
4 copies - 4 average
Wild Cantor
4 copies - 4 average
Disenchant
4 copies - 4 average
Defense Grid
4 copies - 4 average
Wrath of God
4 copies - 4 average
Sacred Foundry
4 copies - 4 average
Remand
4 copies - 4 average
Enduring Renewal
4 copies - 4 average
Compulsive Research
4 copies - 4 average
Hallowed Fountain
4 copies - 4 average
Proclamation of Rebirth
3 copies - 3 average
Ivory Mask
3 copies - 3 average
Circle of Protection: Black
3 copies - 3 average
Grapeshot
2 copies - 2 average
Pandemonium
2 copies - 2 average
copies - 0 average