
Aether Meltdown | Enchantment | Aura | Flash (You may cast this spell any time you could cast an instant.)
Enchant creature or Vehicle
When Aether Meltdown enters the battlefield, you get {E}{E} (two energy counters).
Enchanted creature gets -4/-0. | Jason Felix

Aether Theorist | Creature | Vedalken Rogue | When Aether Theorist enters the battlefield, you get {E}{E}{E} (three energy counters).
{T}, Pay {E}: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) | Lucas Graciano

Curio Vendor | Creature | Vedalken | | Igor Kieryluk

Dramatic Reversal | Instant | | Untap all nonland permanents you control. | Eric Deschamps

Era of Innovation | Enchantment | | Whenever an artifact or Artificer enters the battlefield under your control, you may pay {1}. If you do, you get {E}{E} (two energy counters).
Pay {E}{E}{E}{E}{E}{E}, Sacrifice Era of Innovation: Draw three cards. | Jason Rainville

Glint-Nest Crane | Creature | Bird | Flying
When Glint-Nest Crane enters the battlefield, look at the top four cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in any order. | Christopher Moeller

Revolutionary Rebuff | Instant | | Counter target nonartifact spell unless its controller pays {2}. | Zack Stella

Contraband Kingpin | Creature | Aetherborn Rogue | Lifelink
Whenever an artifact enters the battlefield under your control, scry 1. | Anna Steinbauer

Glassblower's Puzzleknot | Artifact | | When Glassblower's Puzzleknot enters the battlefield, scry 2, then you get {E}{E}. (You get two energy counters. To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)
{2}{U}, Sacrifice Glassblower's Puzzleknot: Scry 2, then you get {E}{E}. | Kieran Yanner