When Aether Hub enters the battlefield, you get {E} (an energy counter).

{T}: Add {C}.

{T}, Pay {E}: Add one mana of any color.

{U}, Sacrifice Aether Spellbomb: Return target creature to its owner's hand.

{1}, Sacrifice Aether Spellbomb: Draw a card.

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 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.

Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

{T}: Add {W}.

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

Spells you control can't be countered.

At the beginning of your end step, discover 5. (Exile cards from the top of your library until you exile a nonland card with mana value 5 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Imprint -- When Chrome Mox enters the battlefield, you may exile a nonartifact, nonland card from your hand.

{T}: Add one mana of any of the exiled card's colors.

Clifftop Retreat enters the battlefield tapped unless you control a Mountain or a Plains.

{T}: Add {R} or {W}.

As Cloud Key enters the battlefield, choose artifact, creature, enchantment, instant, or sorcery.

Spells you cast of the chosen type cost {1} less to cast.

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

Defender

{T}: Creatures you control gain haste until end of turn.

Return target nonland permanent you don't control to its owner's hand.

Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

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

{4}, {T}: Return target creature you control to its owner's hand.

Creatures you control with power 2 or less can't be blocked by creatures with power 3 or greater.

If an ability of a creature you control with power 2 or less triggers, that ability triggers an additional time.

Tap target creature.

Metalcraft -- If you control three or more artifacts, exile that creature.

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.

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.

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power.

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

Multikicker {2} (You may pay an additional {2} any number of times as you cast this spell.)

Everflowing Chalice enters the battlefield with a charge counter on it for each time it was kicked.

{T}: Add {C} for each charge counter on Everflowing Chalice.

{T}, Sacrifice Fabled Passage: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.

Search your library for an artifact card, reveal it, put it into your hand, then shuffle.

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

Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island.

{T}: Add {W} or {U}.

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}.

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

When Goblin Engineer enters the battlefield, you may search your library for an artifact card, put it into your graveyard, then shuffle.

{R}, {T}, Sacrifice an artifact: Return target artifact card with mana value 3 or less from your graveyard to the battlefield.

{T}: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.

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

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

{T}: Add {R}.

({T}: Add {W} or {U}.)

As Hallowed Fountain enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

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.

{T}: Add {W}.

{T}: Add {U}.

When Imperial Recruiter enters the battlefield, search your library for a creature card with power 2 or less, reveal it, put it into your hand, then shuffle.

You may have Imposter Mech enter the battlefield as a copy of a creature an opponent controls, except it's a Vehicle artifact with crew 3 and it loses all other card types.

Crew 3

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life.

{T}: Add {C}.

{4}, {T}, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Kabira Takedown deals damage equal to the number of creatures you control to target creature or planeswalker.

Kabira Plateau enters the battlefield tapped.

{T}: Add {W}.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)

Ward {4}

Whenever Kappa Cannoneer or another artifact enters the battlefield under your control, put a +1/+1 counter on Kappa Cannoneer and it can't be blocked this turn.

Flying

Whenever a player casts their second spell each turn, Ledger Shredder connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Vigilance, trample, haste

Whenever Liberty Prime, Recharged attacks or blocks, sacrifice it unless you pay {E}{E} (two energy counters).

{2}, {T}, Sacrifice an artifact: You get {E}{E} and draw a card.

Double strike, haste

Whenever Lightning Runner 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.

{W}: Exile target card from a graveyard. If it was a permanent card, put a +1/+1 counter on Lion Sash.

Equipped creature gets +1/+1 for each +1/+1 counter on Lion Sash.

Reconfigure {2} ({2}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

{T}, Sacrifice Lotus Petal: Add one mana of any color.

At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you.

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

Mana Vault doesn't untap during your untap step.

At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault.

At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.

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

{1}, {T}: Untap another target artifact.

{3}, {T}: Target creature can't be blocked this turn.

{4}, {T}, Sacrifice Mindslaver: You control target player during that player's next turn. (You see all cards that player could see and make all decisions for the player.)

{T}, Sacrifice Mishra's Bauble: Look at the top card of target player's library. Draw a card at the beginning of the next turn's upkeep.

({T}: Add {R}.)

({T}: Add {R}.)

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.

Metalcraft -- {T}: Add one mana of any color. Activate only if you control three or more artifacts.

{T}: Add {R}.

{T}: Add {W}.

If an artifact or creature entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Return any number of target nonland, nontoken permanents you control to their owners' hands. Draw a card for each card returned to your hand this way.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

When Portable Hole enters the battlefield, exile target nonland permanent an opponent controls with mana value 2 or less until Portable Hole leaves the battlefield.

When Portal to Phyrexia enters the battlefield, each opponent sacrifices three creatures.

At the beginning of your upkeep, put target creature card from a graveyard onto the battlefield under your control. It's a Phyrexian in addition to its other types.

You have no maximum hand size.

{T}: Add {C}.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

{T}: Add {U}.

{T}: Add {R}.

({T}: Add {R} or {W}.)

As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Whenever you cast an artifact spell, create a 1/1 colorless Thopter artifact creature token with flying.

{1}{U}, Sacrifice two artifacts: Draw a card.

Sacrifice Salvager of Ruin: Choose target permanent card in your graveyard that was put there from the battlefield this turn. Return it to your hand.

Draw cards equal to the number of cards in your hand plus one. You have no maximum hand size for the rest of the game.

As Sea Gate, Reborn enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.

{T}: Add {U}.

Sea of Clouds enters the battlefield tapped unless you have two or more opponents.

{T}: Add {W} or {U}.

{T}: Add {U}.

Target creature you control gains protection from the color of your choice until end of turn.

Sejiri Glacier enters the battlefield tapped.

{T}: Add {W}.

{1}: Look at the top three cards of your library, then put them back in any order.

{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Shatterskull Smashing deals X damage divided as you choose among up to two target creatures and/or planeswalkers. If X is 6 or more, Shatterskull Smashing deals twice X damage divided as you choose among them instead.

As Shatterskull, the Hammer Pass enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.

{T}: Add {R}.

{1}, {T}: Draw two cards, then discard a card. Create a 1/1 colorless Pilot creature token with "This creature crews Vehicles as though its power were 2 greater."

Crew 8 (Tap any number of creatures you control with total power 8 or more: This Vehicle becomes an artifact creature until end of turn.)

Shorikai, Genesis Engine can be your commander.

Equipped creature gets +1/-1.

Whenever equipped creature dies, draw two cards.

Equip {1}

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

Spectator Seating enters the battlefield tapped unless you have two or more opponents.

{T}: Add {R} or {W}.

Spikefield Hazard deals 1 damage to any target. If a permanent dealt damage this way would die this turn, exile it instead.

Spikefield Cave enters the battlefield tapped.

{T}: Add {R}.

{T}: Add {C}.

{T}, Pay 1 life: Add one mana of any color. Activate only if you control an artifact.

({T}: Add {U} or {R}.)

As Steam Vents enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Sulfur Falls enters the battlefield tapped unless you control an Island or a Mountain.

{T}: Add {U} or {R}.

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

Exile target creature. Its controller gains life equal to its power.

{T}: Add {C}.

{T}: Add {R} or {W}. Talisman of Conviction deals 1 damage to you.

{T}: Add {C}.

{T}: Add {W} or {U}. Talisman of Progress deals 1 damage to you.

Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)

Exile Teferi's Protection.

Flying

Whenever you cast a historic spell, return target creature card with mana value 3 or less from your graveyard to the battlefield. (Artifacts, legendaries, and Sagas are historic.)

You may look at the top card of your library any time.

As long as The Reality Chip is attached to a creature, you may play lands and cast spells from the top of your library.

Reconfigure {2}{U} ({2}{U}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Training Center enters the battlefield tapped unless you have two or more opponents.

{T}: Add {U} or {R}.

When Unstable Glyphbridge enters the battlefield, if you cast it, for each player, choose a creature with power 2 or less that player controls. Then destroy all creatures except creatures chosen this way.

Craft with artifact {3}{W}{W} ({3}{W}{W}, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

Flying

Whenever an opponent casts a spell during their turn, they can't attack you or planeswalkers you control this turn.

Each opponent who attacked you or a planeswalker you control this turn can't cast spells.

Whenever you cast an artifact spell, draw a card.

{1}, {T}: Untap target artifact.

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

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