When Biomathematician enters the battlefield, create a 0/0 green and blue Fractal creature token. Put a +1/+1 counter on each Fractal you control.

Flying When Cloud of Faeries enters the battlefield, untap up to two lands. Cycling {2} ({2}, Discard this card: Draw a card.)

When Maul Splicer enters the battlefield, create two 3/3 colorless Phyrexian Golem artifact creature tokens. Golem creatures you control have trample.

Flying When Peregrine Drake enters the battlefield, untap up to five lands.

Commander creatures you own have "When this creature enters or leaves the battlefield, draw a card."

Whenever another creature enters the battlefield, you gain 1 life.

Whenever a creature enters the battlefield under your control, Impact Tremors deals 1 damage to each opponent.

{T}: Add {C}. Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

When Crystal Grotto enters the battlefield, scry 1. {T}: Add {C}. {1}, {T}: Add one mana of any color.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

({T}: Add {G}.)

Gruul Guildgate enters the battlefield tapped. {T}: Add {R} or {G}.

({T}: Add {U}.)

Izzet Guildgate enters the battlefield tapped. {T}: Add {U} or {R}.

When Maestros Theater enters the battlefield, sacrifice it. When you do, search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

({T}: Add {U} or {R}.) Molten Tributary enters the battlefield tapped.

({T}: Add {R}.)

Racers' Ring enters the battlefield tapped. {T}: Add {R} or {G}. {2}{R}{G}, {T}, Sacrifice Racers' Ring: Draw a card.

When Riveteers Overlook enters the battlefield, sacrifice it. When you do, search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle and you gain 1 life.

Rugged Highlands enters the battlefield tapped. When Rugged Highlands enters the battlefield, you gain 1 life. {T}: Add {R} or {G}.

Swiftwater Cliffs enters the battlefield tapped. When Swiftwater Cliffs enters the battlefield, you gain 1 life. {T}: Add {U} or {R}.

({T}: Add {G} or {U}.) Tangled Islet enters the battlefield tapped.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Thornwood Falls enters the battlefield tapped. When Thornwood Falls enters the battlefield, you gain 1 life. {T}: Add {G} or {U}.

Transguild Promenade enters the battlefield tapped. When Transguild Promenade enters the battlefield, sacrifice it unless you pay {1}. {T}: Add one mana of any color.

Uncharted Haven enters the battlefield tapped. As Uncharted Haven enters the battlefield, choose a color. {T}: Add one mana of the chosen color.

When Aether Adept enters the battlefield, return target creature to its owner's hand.

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.) Return target nonland permanent to its owner's hand. If this spell was kicked, draw a card.

Return target nonland permanent to its owner's hand. If you controlled that permanent, draw a card.

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.) Return target nonland permanent to its owner's hand. If this spell was kicked, draw a card.

When Man-o'-War enters the battlefield, return target creature to its owner's hand.

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.

Flying When Shrieking Drake enters the battlefield, return a creature you control to its owner's hand.

Return two target creatures to their owners' hands. Wizardcycling {2} ({2}, Discard this card: Search your library for a Wizard card, reveal it, put it into your hand, then shuffle.)

When Bronze Walrus enters the battlefield, 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.) {T}: Add one mana of any color.

Flying When Cloudkin Seer enters the battlefield, draw a card.

When Elvish Rejuvenator enters the battlefield, look at the top five cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest on the bottom of your library in a random order.

When Elvish Visionary enters the battlefield, draw a card.

Flying When Mulldrifter enters the battlefield, draw two cards. Evoke {2}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

When Pondering Mage enters the battlefield, look at the top three cards of your library, then put them back in any order. You may shuffle. Draw a card.

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Exile target creature you control, then return that card to the battlefield under its owner's control. Draw a card.

Exile up to two target creatures you control, then return those cards to the battlefield under their owner's control.

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Exile target artifact or creature, then return it to the battlefield under its owner's control with a +1/+1 counter on it.

Exile target creature you control, then return that card to the battlefield under its owner's control. If a Pirate was exiled this way, draw a card.

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

{T}: Add one mana of any color. {4}, {T}: Each player who controls a permanent named Bonder's Ornament draws a card.

When Coiling Oracle enters the battlefield, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.

{T}: Add {G}.

When Emrakul's Hatcher enters the battlefield, create three 0/1 colorless Eldrazi Spawn creature tokens. They have "Sacrifice this creature: Add {C}."

When Exhibition Magician enters the battlefield, choose one — • Create a 1/1 green and white Citizen creature token. • Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

When Farhaven Elf enters the battlefield, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

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

Each spell you cast that's red or green costs {1} less to cast.

Instant and sorcery spells you cast cost {1} less to cast.

Vigilance, trample When Jewel Thief enters the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

When Llanowar Visionary enters the battlefield, draw a card. {T}: Add {G}.

Flying When Rapacious Dragon enters the battlefield, create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

Search your library for up to two Forest cards, put them onto the battlefield, then shuffle.

When Springbloom Druid enters the battlefield, you may sacrifice a land. If you do, search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Choose one — • Abrade deals 3 damage to target creature. • Destroy target artifact.

When Conclave Naturalists enters the battlefield, you may destroy target artifact or enchantment.

When Ingot Chewer enters the battlefield, destroy target artifact. Evoke {R} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Changeling (This card is every creature type.) When Masked Vandal enters the battlefield, you may exile a creature card from your graveyard. If you do, exile target artifact or enchantment an opponent controls.

Exile target artifact or creature. Its controller creates a 4/4 blue and red Elemental creature token.

When Archaeomancer enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

When Ardent Elementalist enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

When Izzet Chronarch enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Defender When Mnemonic Wall enters the battlefield, you may return target instant or sorcery card from your graveyard to your hand.

When Salvager of Secrets enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep. You draw a card at the beginning of the next turn's upkeep.

Counter target spell.

{2}, {T}, Sacrifice Expedition Map: Search your library for a land card, reveal it, put it into your hand, then shuffle.

Gruul Turf enters the battlefield tapped. When Gruul Turf enters the battlefield, return a land you control to its owner's hand. {T}: Add {R}{G}.

{T}: Add one mana of any color. {2}, {T}: Exile target card from a graveyard.

Izzet Boilerworks enters the battlefield tapped. When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand. {T}: Add {U}{R}.

Enchant creature Enchanted creature is a Treefolk with base power and toughness 0/4 and loses all abilities.

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.

Search your library for a Forest card, put that card onto the battlefield, then shuffle.

Flash When Omen of the Sea enters the battlefield, scry 2, then draw a card. {2}{U}, Sacrifice Omen of the Sea: Scry 2.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Simic Growth Chamber enters the battlefield tapped. When Simic Growth Chamber enters the battlefield, return a land you control to its owner's hand. {T}: Add {G}{U}.

Search your library for a Forest card, put it onto the battlefield, then shuffle.

Sacrifice this creature: Add {C}.