Flying When Aethersphere Harvester enters the battlefield, you get {E}{E} (two energy counters). Pay {E}: Aethersphere Harvester gains lifelink until end of turn. Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

{T}: You get {E} (an energy counter). {T}, Pay {E}{E}{E}: Consulate Turret deals 2 damage to target player or planeswalker.

Vigilance When Aether Inspector enters the battlefield, you get {E}{E} (two energy counters). Whenever Aether Inspector attacks, you may pay {E}{E}. If you do, create a 1/1 colorless Servo artifact creature token.

Whenever Aethergeode Miner attacks, you get {E}{E} (two energy counters). Pay {E}{E}: Exile Aethergeode Miner, then return it to the battlefield under its owner's control.

Flying Whenever Aetherstorm Roc or another creature enters the battlefield under your control, you get {E} (an energy counter). Whenever Aetherstorm Roc attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it and tap up to one target creature defending player controls.

Flying When Aethertide Whale enters the battlefield, you get {E}{E}{E}{E}{E}{E} (six energy counters). Pay {E}{E}{E}{E}: Return Aethertide Whale to its owner's hand.

When Aethertorch Renegade enters the battlefield, you get {E}{E}{E}{E} (four energy counters). {T}, Pay {E}{E}: Aethertorch Renegade deals 1 damage to target creature. {T}, Pay {E}{E}{E}{E}{E}{E}{E}{E}: Aethertorch Renegade deals 6 damage to target player or planeswalker.

When Consul's Shieldguard enters the battlefield, you get {E}{E} (two energy counters). Whenever Consul's Shieldguard attacks, you may pay {E}. If you do, another target attacking creature gains indestructible until end of turn.

Whenever you cast an artifact spell, you get {E} (an energy counter). {T}, Pay {E}: Target creature gets +1/+0 and gains trample and haste until end of turn. {T}, Pay {E}{E}{E}: Draw a card. {T}, Pay {E}{E}{E}{E}{E}: Return target artifact card from your graveyard to the battlefield tapped.

Flying When Eddytrail Hawk enters the battlefield, you get {E}{E} (two energy counters). Whenever Eddytrail Hawk attacks, you may pay {E}. If you do, another target attacking creature gains flying until end of turn.

When Electrostatic Pummeler enters the battlefield, you get {E}{E}{E} (three energy counters). Pay {E}{E}{E}: Electrostatic Pummeler gets +X/+X until end of turn, where X is its power.

Defender When Hightide Hermit enters the battlefield, you get {E}{E}{E}{E} (four energy counters). Pay {E}{E}: Hightide Hermit can attack this turn as though it didn't have defender.

When Janjeet Sentry enters the battlefield, you get {E}{E} (two energy counters). {T}, Pay {E}{E}: You may tap or untap target artifact or creature.

Haste When Lathnu Hellion enters the battlefield, you get {E}{E} (two energy counters). At the beginning of your end step, sacrifice Lathnu Hellion unless you pay {E}{E}.

When Maulfist Doorbuster enters the battlefield, you get {E}{E} (two energy counters). Whenever Maulfist Doorbuster attacks, you may pay {E}. If you do, target creature can't block this turn.

When Multiform Wonder enters the battlefield, you get {E}{E}{E} (three energy counters). Pay {E}: Multiform Wonder gains your choice of flying, vigilance, or lifelink until end of turn. Pay {E}: Multiform Wonder gets +2/-2 or -2/+2 until end of turn.

When Reservoir Walker enters the battlefield, you gain 3 life and get {E}{E}{E} (three energy counters).

Whenever Rex, Cyber-Hound deals combat damage to a player, they mill two cards and you get {E}{E} (two energy counters). Pay {E}{E}: Choose target creature card in a graveyard. Exile it with a brain counter on it. Activate only as a sorcery. Rex has all activated abilities of all cards in exile with brain counters on them.

Double strike (This creature deals both first-strike and regular combat damage.) When Scrapper Champion enters the battlefield, you get {E}{E} (two energy counters). Whenever Scrapper Champion attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it.

When Shipwreck Moray enters the battlefield, you get {E}{E}{E}{E} (four energy counters). Pay {E}: Shipwreck Moray gets +2/-2 until end of turn.

When Spontaneous Artist enters the battlefield, you get {E} (an energy counter). Pay {E}: Target creature gains haste until end of turn.

Trample Whenever you get one or more {E} (energy counters), Territorial Gorger gets +2/+2 until end of turn.

When Thriving Grubs enters the battlefield, you get {E}{E} (two energy counters). Whenever Thriving Grubs attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it.

When Thriving Ibex enters the battlefield, you get {E}{E} (two energy counters). Whenever Thriving Ibex attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it.

When Thriving Turtle enters the battlefield, you get {E}{E} (two energy counters). Whenever Thriving Turtle attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it.

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.)

Whenever a permanent you control is put into a graveyard, you get {E} (an energy counter). {T}, Pay {E}{E}{E}{E}{E}{E}: Look at the top six cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

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.

Scry 2, then draw two cards. You get {E}{E} (two energy counters).

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

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.

Flying At the beginning of your upkeep, you get {E}{E}{E} (three energy counters). Pay {E}{E}{E}{E}{E}{E}{E}{E}: Return all other creatures to their owners' hands. Activate only as a sorcery.

Deadlock Trap enters the battlefield tapped. When Deadlock Trap enters the battlefield, you get {E}{E} (two energy counters). {T}, Pay {E}: Tap target creature or planeswalker. Its activated abilities can't be activated this turn.

Whenever you cast an instant or sorcery spell, you get {E}{E} (two energy counters). {T}, Pay {E}{E}{E}{E}{E}: Dynavolt Tower deals 3 damage to any target.

First strike When Aether Chaser enters the battlefield, you get {E}{E} (two energy counters). Whenever Aether Chaser attacks, you may pay {E}{E}. If you do, create a 1/1 colorless Servo artifact creature token.