When Aether Herder enters the battlefield, you get (two energy counters).

Whenever Aether Herder attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token.

Vigilance

When Aether Inspector enters the battlefield, you get (two energy counters).

Whenever Aether Inspector attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

When Aether Poisoner enters the battlefield, you get (two energy counters).

Whenever Aether Poisoner attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token.

When Aether Theorist enters the battlefield, you get (three energy counters).

, Pay : Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Flying

When Aethersphere Harvester enters the battlefield, you get (two energy counters).

Pay : 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.)

Flying

Whenever Aetherstorm Roc or another creature enters the battlefield under your control, you get (an energy counter).

Whenever Aetherstorm Roc attacks, you may pay . 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 six (six energy counters).

Pay : Return Aethertide Whale to its owner's hand.

Trample

Whenever Aetherwind Basker enters the battlefield or attacks, you get (an energy counter) for each creature you control.

Pay : Aetherwind Basker gets +1/+1 until end of turn.

Landfall — Whenever a land enters the battlefield under your control, you get (an energy counter).

Pay eight : Create a 6/6 colorless Beast artifact creature token.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You get (two energy counters).

Trample

When Behemoth of Vault 0 enters the battlefield, you get (four energy counters).

When Behemoth of Vault 0 dies, you may pay an amount of equal to target nonland permanent's mana value. When you do, destroy that permanent.

Metalcraft — : You get (an energy counter). Activate only if you control three or more artifacts.

Whenever you get one or more during your turn, creatures you control get +1/+1 until end of turn.

When Consulate Surveillance enters the battlefield, you get (four energy counters).

Pay : Prevent all damage that would be dealt to you this turn by a source of your choice.

When Consul's Shieldguard enters the battlefield, you get (two energy counters).

Whenever Consul's Shieldguard attacks, you may pay . If you do, another target attacking creature gains indestructible until end of turn.

Whenever a creature enters the battlefield under your control, you get (an energy counter).

, : Return target creature you control to its owner's hand.

Choose target creature. You get (two energy counters), then you may pay any amount of . The creature gets -1/-1 until end of turn for each paid this way.

Whenever you cast an instant or sorcery spell, you get (two energy counters).

, Pay : Dynavolt Tower deals 3 damage to any target.

Counter target spell. You get an amount of (energy counters) equal to its mana value.

Flying, trample

Whenever Empyreal Voyager deals combat damage to a player, you get that many (energy counters).

Whenever you get one or more (energy counters), put a +1/+1 counter on target creature you control.

, : You get .

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

Whenever Gonti's Aether Heart or another artifact enters the battlefield under your control, you get (two energy counters).

Pay eight , Exile Gonti's Aether Heart: Take an extra turn after this one.

When Greenbelt Rampager enters the battlefield, pay (two energy counters). If you can't, return Greenbelt Rampager to its owner's hand and you get .

: Add .

, : You get (an energy counter).

, , Pay X , Sacrifice HELIOS One: Destroy target nonland permanent with mana value X. Activate only as a sorcery.

Defender

When Hightide Hermit enters the battlefield, you get (four energy counters).

Pay : Hightide Hermit can attack this turn as though it didn't have defender.

Haste

When Lathnu Hellion enters the battlefield, you get (two energy counters).

At the beginning of your end step, sacrifice Lathnu Hellion unless you pay .

Double strike, haste

Whenever Lightning Runner attacks, you get (two energy counters), then you may pay eight . If you pay, untap all creatures you control, and after this phase, there is an additional combat phase.

Whenever Longtusk Cub deals combat damage to a player, you get (two energy counters).

Pay : Put a +1/+1 counter on Longtusk Cub.

When Maulfist Doorbuster enters the battlefield, you get (two energy counters).

Whenever Maulfist Doorbuster attacks, you may pay . If you do, target creature can't block this turn.

When Multiform Wonder enters the battlefield, you get (three energy counters).

Pay : Multiform Wonder gains your choice of flying, vigilance, or lifelink until end of turn.

Pay : Multiform Wonder gets +2/-2 or -2/+2 until end of turn.

Equipped creature gets +1/+1.

Whenever equipped creature attacks, you get (two energy counters).

Pay : Choose target creature that's blocking equipped creature. Flip a coin. If you win the flip, exile the chosen creature. Otherwise, Plasma Caster deals 1 damage to it.

Equip

Whenever Rex, Cyber-Hound deals combat damage to a player, they mill two cards and you get (two energy counters).

Pay : 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.

Robobrain War Mind's power is equal to the number of cards in your hand.

When Robobrain War Mind enters the battlefield, you get an amount of (energy counters) equal to the number of artifact creatures you control.

Whenever Robobrain War Mind attacks, you may pay . If you do, draw a card.

When Sage of Shaila's Claim enters the battlefield, you get (three energy counters).

Flash

This spell costs less to cast for each creature attacking you.

When Sentry Bot enters the battlefield, you get for each creature attacking you.

At the beginning of combat on your turn, you may pay . If you do, put a +1/+1 counter on each creature you control.

Flash (You may cast this spell any time you could cast an instant.)

Whenever Shielded Aether Thief blocks, you get (an energy counter).

, Pay : Draw a card.

When Spontaneous Artist enters the battlefield, you get (an energy counter).

Pay : Target creature gains haste until end of turn.

When T-45 Power Armor enters the battlefield, you get (two energy counters).

Equipped creature gets +3/+3 and doesn't untap during its controller's untap step.

At the beginning of your upkeep, you may pay . If you do, untap equipped creature, then put your choice of a menace, trample, or lifelink counter on it.

Equip

When The Motherlode, Excavator enters the battlefield, choose target opponent. You get an amount of (energy counters) equal to the number of nonbasic lands that player controls.

Whenever The Motherlode attacks, you may pay . When you do, destroy target nonbasic land defending player controls, and creatures that player controls without flying can't block this turn.

When Thriving Ibex enters the battlefield, you get (two energy counters).

Whenever Thriving Ibex attacks, you may pay . If you do, put a +1/+1 counter on it.

When Thriving Rhino enters the battlefield, you get (two energy counters).

Whenever Thriving Rhino attacks, you may pay . If you do, put a +1/+1 counter on it.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I, II — Tap up to one target creature and put a stun counter on it. You get (two energy counters).

III — Pay any amount of . If you paid one or more this way, shuffle your library, then exile that many cards from the top. You may play one of those cards without paying its mana cost.

When Whirler Virtuoso enters the battlefield, you get (three energy counters).

Pay : Create a 1/1 colorless Thopter artifact creature token with flying.