Astral Cornucopia
Artifact
This artifact enters with X charge counters on it.
: Choose a color. Add one mana of that color for each charge counter on this artifact.
Aleksi Briclot
Rulings
If you choose 1 for the value of X, Astral Cornucopia will cost {3} to cast and enter the battlefield with one charge counter. If you choose 2 for the value of X, it will cost {6} to cast and enter the battlefield with two charge counters, and so on.
(wotc • 2014-02-01)
The last ability is a mana ability. It doesn't use the stack and can't be responded to.
(wotc • 2014-02-01)
Rulings
If you choose 1 for the value of X, Astral Cornucopia will cost {3} to cast and enter the battlefield with one charge counter. If you choose 2 for the value of X, it will cost {6} to cast and enter the battlefield with two charge counters, and so on.
(wotc • 2014-02-01)
The last ability is a mana ability. It doesn't use the stack and can't be responded to.
(wotc • 2014-02-01)