Astral Cornucopia

Mana cost: {X}{X}{X}
Type: Artifact
Set: Commander 2016 #243 (rare)
Price: $0.78 USD

This artifact enters with X charge counters on it.
{T}: Choose a color. Add one mana of that color for each charge counter on this artifact.

Astral Cornucopia has 10 printings, first in Born of the Gods (2014). EDHREC ranks it #1,313 among Commander cards. It appears most in Atraxa, Praetors' Voice decks (19,632 on EDHREC). 5 public decks on TCG run it. It has 2 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: legal

Public decks that run Astral Cornucopia

Breed Lethality - Commander 2016, led by Atraxa, Praetors' Voice
Breed Lethality - Commander Anthology Volume II, led by Atraxa, Praetors' Voice
Counter Intelligence - Edge of Eternities Commander Deck, led by Kilo, Apogee Mind
Quandrix Unlimited - Secrets of Strixhaven, led by Zimone, Infinite Analyst
We Are The Borg - Star Trek Commander, led by The Borg Queen

Commanders that run Astral Cornucopia most

Deck counts from EDHREC.

Atraxa, Praetors' Voice: 19,632 decks
Kilo, Apogee Mind: 13,689 decks
Zimone, Infinite Analyst: 7,438 decks
Zaxara, the Exemplary: 4,350 decks
Magus Lucea Kane: 3,422 decks
Xavier Sal, Infested Captain: 2,548 decks
Tidus, Yuna's Guardian: 2,203 decks
Brimaz, Blight of Oreskos: 2,090 decks

Often played with Astral Cornucopia

Cards that show up in the same decks on EDHREC.

Rulings

2014-02-01: 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.
2014-02-01: The last ability is a mana ability. It doesn't use the stack and can't be responded to.