Everflowing Chalice is a uncommon Artifact card from Commander Anthology Volume II (CM2), collector number 188. Current market price: $0.30, TCGplayer market prices via Scryfall.
Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.) This artifact enters with a charge counter on it for each time it was kicked. {T}: Add {C} for each charge counter on this artifact.