Everflowing Chalice

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.)
Everflowing Chalice enters with a charge counter on it for each time it was kicked.
{T}: Add {C} for each charge counter on Everflowing Chalice.

Modern Horizons 3 Commander

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.)
Everflowing Chalice enters the battlefield with a charge counter on it for each time it was kicked.
{T}: Add {C} for each charge counter on Everflowing Chalice.

Fallout

Murders at Karlov Manor Commander

The Lost Caverns of Ixalan Commander

Multikicker {2}
Everflowing Chalice enters the battlefield with a charge counter on it for each time it was kicked.
{T}: Add {C} for each charge counter on Everflowing Chalice.

You can cast Everflowing Chalice without kicking it at all if you wish. However, if Everflowing Chalice has no charge counters on it, activating its last ability won't produce any mana.