If you would get one or more {E} (energy counters), you get twice that many {E} instead. {T}: You get {E}, then you may pay one or more {E}. If you do, create an X/X black Aetherborn creature token, where X is the amount of {E} paid this way.

Whenever a creature you control enters, you get {E} (an energy counter). {4}, {T}: Return target creature you control to its owner's hand.

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.

Whenever you get one or more {E} (energy counters), put a +1/+1 counter on target creature you control. {4}, {T}: You get {E}.

Whenever another creature you control enters, you gain 1 life and get {E} (an energy counter). Whenever you attack, you may pay {E}{E}{E}. When you do, put two +1/+1 counters and a flying counter on target attacking creature. It becomes an Angel in addition to its other types.

If you would put one or more counters on a creature or planeswalker you control or on yourself, put that many plus one of each of those kinds of counters on that permanent or player instead. Choose a Background (You can have a Background as a second commander.)

Whenever Rex 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.

Menace, haste Whenever Satya attacks, create a tapped and attacking token that's a copy of up to one other target nontoken creature you control. You get {E}{E} (two energy counters). At the beginning of the next end step, sacrifice that token unless you pay an amount of {E} equal to its mana value.

When this creature enters, you get {E}{E} (two energy counters). Whenever an artifact creature you control attacks, you may pay {E}. If you do, put your choice of a +1/+1, first strike, or trample counter on that creature.

Flash This spell costs {1} less to cast for each creature attacking you. When this creature enters, you get {E} for each creature attacking you. At the beginning of combat on your turn, you may pay {E}{E}{E}. If you do, put a +1/+1 counter on each creature you control.

Flying, lifelink Whenever you gain life, you get that many {E} (energy counters). {W}{U}{U}, {T}, Pay X {E}: Draw X cards.

Whenever a permanent you control is put into a graveyard, you get {E} (an energy counter). {T}, Pay six {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.

{T}: Draw a card, then discard a card. Put a quest counter on Arcade Gannon. For Auld Lang Syne — Once during each of your turns, you may cast an artifact or Human spell from your graveyard with mana value less than or equal to the number of quest counters on Arcade Gannon.

{T}: You get {E}{E} (two energy counters). {T}, Pay {E}{E}: Tap target creature. {T}, Pay {E}{E}{E}: Draw a card. Pay {E}{E}{E}{E}: This Vehicle becomes an artifact creature until end of turn. Crew 4

If you would get one or more {E} (energy counters), you get that many plus one {E} instead. {T}: Draw a card. Activate only if you've paid or lost four or more {E} this turn.

Robobrain War Mind's power is equal to the number of cards in your hand. When this creature enters, you get an amount of {E} (energy counters) equal to the number of artifact creatures you control. Whenever this creature attacks, you may pay {E}{E}{E}. If you do, draw a card.

Landfall — Whenever a land you control enters, you get {E} (an energy counter). {T}, Pay six {E}: Draw three cards.

Flash (You may cast this spell any time you could cast an instant.) Whenever this creature blocks, you get {E} (an energy counter). {T}, Pay {E}{E}{E}: Draw a card.

Haste Whenever this creature attacks, exile the top card of your library. You may get {E}{E} (two energy counters). If you don't, you may play that card this turn. {T}, Pay {E}{E}{E}: This creature deals 3 damage to any target.

At the beginning of your upkeep, if you control an artifact, create a 1/1 colorless Thopter artifact creature token with flying. Whenever one or more artifact creatures you control deal combat damage to a player, draw a card.

Draw a card. You get {E}{E} (two energy counters).

Whenever you cast a spell, you get an amount of {E} (energy counters) equal to the amount of mana spent to cast that spell. {T}, Pay fifty {E}: Draw seven cards. You may cast any number of spells from your hand without paying their mana costs.

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

Double strike, haste Whenever this creature attacks, you get {E}{E} (two energy counters), then you may pay eight {E}. If you pay, untap all creatures you control, and after this phase, there is an additional combat phase.

When this land enters, you get {E} (an energy counter). {T}: Add {C}. {T}, Pay {E}: Add one mana of any color.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {W}{U}.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {R}{W}.

{T}: Add {C}. {2}, {T}, Sacrifice this land: Return target artifact card from your graveyard to your hand.

{T}: Add one mana of any color in your commander's color identity.

{T}: Add one mana of any color that a land an opponent controls could produce.

{1}, {T}: Add {U}{R}.

This land enters tapped unless you control a Plains or an Island. {T}: Add {W} or {U}.

{T}: Add {C}. {1}, {T}: You get {E} (an energy counter). {3}, {T}, Pay X {E}, Sacrifice this land: Destroy target nonland permanent with mana value X. Activate only as a sorcery.

({T}: Add {U}.)

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {U}{R}.

({T}: Add {R}.)

This land enters tapped. {T}: Add {U}, {R}, or {W}.

({T}: Add {W}.)

({T}: Add {W} or {U}.) This land enters tapped unless you control two or more basic lands.

This land enters tapped. Indestructible {T}: Add {W} or {U}.

This land enters tapped. Indestructible {T}: Add {R} or {W}.

This land enters tapped. Indestructible {T}: Add {U} or {R}.

{1}, {T}: Add {W}{U}.

This land enters tapped unless you control an Island or a Mountain. {T}: Add {U} or {R}.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {U} or {R}.

This land enters tapped. When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.) {T}: Add {W} or {U}.

When this enchantment enters, you get {E}{E}{E}{E} (four energy counters). Pay {E}{E}: Prevent all damage that would be dealt to you this turn by a source of your choice.

Enchant permanent Enchanted permanent has hexproof. When enchanted permanent leaves the battlefield, if it was historic, draw two cards. (Artifacts, legendaries, and Sagas are historic.)

Artifacts you control have hexproof. (They can't be the targets of spells or abilities your opponents control.) At the beginning of your upkeep, if you control the artifact with the highest mana value or tied for the highest mana value, draw a card.

Enchant creature Enchanted creature has double strike. (It deals both first-strike and regular combat damage.)

Metalcraft — {T}: You get {E} (an energy counter). Activate only if you control three or more artifacts. Whenever you get one or more {E} during your turn, creatures you control get +1/+1 until end of turn.

When this creature enters, you get {E}{E} (two energy counters). At the beginning of combat on your turn, you may pay {E}. If you do, another target creature you control gets +1/+0 and gains haste until end of turn.

Flash When this Equipment enters, you get {E}{E} (two energy counters). When this Equipment enters, attach it to target creature you control. Equipped creature gets +2/+0. Equip—Pay {E}{E}.

Equipped creature gets +1/+1. Whenever equipped creature attacks, you get {E}{E} (two energy counters). Pay {E}{E}: Choose target creature that's blocking equipped creature. Flip a coin. If you win the flip, exile the chosen creature. Otherwise, this Equipment deals 1 damage to it. Equip {2}

Whenever this creature or equipped creature attacks, you get {E} (an energy counter), then it gets +X/+X until end of turn, where X is the amount of {E} you have. Reconfigure—Pay {2} or {E}{E}{E}. (Pay {2} or {E}{E}{E}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Enchant creature Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand.

Enchant creature As long as enchanted creature is white, it gets +1/+1 and has lifelink. (Damage dealt by the creature also causes its controller to gain that much life.) As long as enchanted creature is blue, it gets +1/+1 and can't be blocked.

{T}: Add one mana of any color. {4}, {T}: Choose one. Activate only as a sorcery. • Double the number of each kind of counter on target permanent. • Double the number of each kind of counter you have.

{T}: Add one mana of any color in your commander's color identity.

{1}, {T}: Add {R}{W}.

{T}: Add {C}. {3}, {T}: You get {E}{E}{E} (three energy counters). {T}, Pay {E}{E}{E}: Add three mana in any combination of colors.

Flying Artifact spells you cast cost {1} less to cast.

{T}: Add {U}. Spend this mana only to cast an artifact spell or activate an ability.

{1}, {T}: Add {U}{R}.

{T}: Add {C}{C}.

This artifact enters tapped. When this artifact enters, you get {E}{E}{E} (three energy counters). {T}: Add {C}. {T}, Pay {E}: Add one mana of any color.

Artifacts you control have ward {1}. (Whenever an artifact you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.) When Elder Owyn Lyons enters or dies, return target artifact card from your graveyard to your hand.

Flash (You may cast this spell any time you could cast an instant.) Enchant creature or Vehicle When this Aura enters, 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 eight {E}: Return all other creatures to their owners' hands. Activate only as a sorcery.

This spell costs {1} less to cast for each {E} (energy counter) you've paid or lost this turn. Haste Whenever this creature attacks, you get {E}{E}, then you may pay eight {E}. When you do, this creature deals 8 damage divided as you choose among up to eight targets.

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

Exile up to one target artifact or creature. Return it to the battlefield under its owner's control at the beginning of the next end step. Explosive Getaway deals 4 damage to each creature.

Choose target creature or planeswalker. You get {E}{E}{E} (three energy counters), then you may pay any amount of {E}. Galvanic Discharge deals that much damage to that permanent.

Choose target creature. You get {E}{E}{E} (three energy counters), then you may pay any amount of {E}. Harnessed Lightning deals that much damage to that creature.

You get {E} (an energy counter), then you may pay one or more {E}. If you do, each creature you control with power equal to the amount of {E} paid this way gains indestructible until end of turn. Destroy all creatures.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield. You get {E}{E} (two energy counters). At the beginning of your first main phase, sacrifice this enchantment unless you pay {E}.

Flying Whenever this creature or another creature you control enters, you get {E} (an energy counter). Whenever this creature 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 this creature enters, you get six {E} (energy counters). Pay {E}{E}{E}{E}: Return this creature to its owner's hand.

Strive — This spell costs {2}{W} more to cast for each target beyond the first. Any number of target creatures each get +1/+1 and gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)

Whenever you attack a player with one or more equipped creatures, draw a card. {W}: You may unattach an Equipment from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.

Enchant creature Enchanted creature gets +1/+1 for each artifact and/or enchantment you control.

First strike When this creature enters, you get {E}{E} (two energy counters). Then if you cast it from your hand, exile cards from the top of your library until you exile a nonland card. You may cast that card by paying an amount of {E} equal to its mana value rather than paying its mana cost.

When Astor enters, look at the top seven cards of your library. You may reveal an Equipment or Vehicle card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. Equipment you control have equip {1}. Vehicles you control have crew 1.

Whenever this creature deals combat damage to a player, you get that many {E}. At the beginning of combat on your turn, you may pay {E}{E}. When you do, this creature becomes a copy of another target creature you control, except it has this ability and "Whenever this creature deals combat damage to a player, you get that many {E}."