Woodweaver's Puzzleknot

Oracle Text
When Woodweaver's Puzzleknot enters the battlefield, you gain 3 life and get
(three energy counters)., Sacrifice Woodweaver's Puzzleknot: You gain 3 life and get .
Card Rulings
2/9/2017 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 , you get that many energy counters. To pay one or more , 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.
With only this and the first big energy card spoiled, Aetherworks Marvel, you can turn 2 this, turn 3 sac, turn 4 Marvel casting Emry from deck. And that's with just 2 energy centered cards, we have a lot more to see and I guess it's pretty safe to take for granted already that energy decks are gonna be busted.