Oracle

Legendary Artifact 

Whenever Gonti's Aether Heart or another artifact enters the battlefield under your control, you get EE (two energy counters).
Pay EEEEEEEE, Exile Gonti's Aether Heart: Take an extra turn after this one.

Tournooi-info

Legal in: Vintage, Legacy, Modern, Commander

Officiele rulings

2/9/2017
E is the energy symbol. It represents one energy counter.

2/9/2017
Energy counters are a kind of counter that a player may have. They’re not associated with specific permanents. (Other kinds of counters that players may have include poison and experience.)

2/9/2017
Keep careful track of how many energy counters each player has. You may do so by keeping a running count on paper, by using a die, or by any other clear and mutually agreeable method.

2/9/2017
If an effect says you get one or more E, you get that many energy counters. To pay one or more E, you lose that many energy counters. Any effects that interact with counters a player gets, has, or loses can interact with energy counters.

2/9/2017
Energy counters aren’t mana. They don’t go away as steps, phases, and turns end, and effects that add mana “of any type” to your mana pool can’t give you energy counters.

2/9/2017
You can’t pay more energy counters than you have.

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