As Adaptive Automaton enters, choose a creature type.

Adaptive Automaton is the chosen type in addition to its other types.

Other creatures you control of the chosen type get +1/+1.

As An-Zerrin Ruins enters, choose a creature type.

Creatures of the chosen type don't untap during their controllers' untap steps.

As Ashes of the Fallen enters, choose a creature type.

Each creature card in your graveyard has the chosen creature type in addition to its other types.

Changeling (This card is every creature type.)

As Bloodline Pretender enters, choose a creature type.

Whenever another creature you control of the chosen type enters, put a +1/+1 counter on Bloodline Pretender.

As Brass Herald enters, choose a creature type.

When Brass Herald enters, reveal the top four cards of your library. Put all creature cards of the chosen type revealed this way into your hand and the rest on the bottom of your library in any order.

Creatures of the chosen type get +1/+1.

As Cavern of Souls enters, choose a creature type.

: Add .

: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

As Conspiracy enters, choose a creature type.

Creatures you control are the chosen type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

As Cover of Darkness enters, choose a creature type.

Creatures of the chosen type have fear. (They can't be blocked except by artifact creatures and/or black creatures.)

Choose a creature type. Draw a card for each permanent you control of that type.

As Door of Destinies enters, choose a creature type.

Whenever you cast a spell of the chosen type, put a charge counter on Door of Destinies.

Creatures you control of the chosen type get +1/+1 for each charge counter on Door of Destinies.

As Engineered Plague enters, choose a creature type.

All creatures of the chosen type get -1/-1.

Choose a creature type. Look at the top six cards of your library. You may reveal any number of cards of the chosen type from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in a random order.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Choose a creature type. Return up to two creature cards of that type from your graveyard to the battlefield. If this spell was foretold, return all creature cards of that type from your graveyard to the battlefield instead.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

As Icon of Ancestry enters, choose a creature type.

Creatures you control of the chosen type get +1/+1.

, : Look at the top three cards of your library. You may reveal a creature card of the chosen type from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flash

As Instruments of War enters, choose a creature type.

Creatures you control of the chosen type get +1/+1.

Choose a creature type. For each creature you control of the chosen type, create a token that's a copy of that creature. Those tokens gain haste. Exile them at the beginning of the next end step.

Choose a creature type. Destroy all creatures that aren't of the chosen type.

Choose a creature type. You gain 2 life for each permanent you control of that type.

As Mirror of the Forebears enters, choose a creature type.

: Until end of turn, Mirror of the Forebears becomes a copy of target creature you control of the chosen type, except it's an artifact in addition to its other types.

Flying

: Mistform Wakecaster becomes the creature type of your choice until end of turn.

, : Choose a creature type. Each creature you control becomes that type until end of turn.

Changeling (This card is every creature type.)

As Morophon, the Boundless enters, choose a creature type.

Spells of the chosen type you cast cost less to cast. This effect reduces only the amount of colored mana you pay.

Other creatures you control of the chosen type get +1/+1.

You may discard a Swamp card rather than pay this spell's mana cost.

Choose a creature type. All creatures of that type get -1/-1 until end of turn.

Choose a creature type. Target player draws X cards and loses X life, where X is the number of creatures they control of the chosen type.

Choose a creature type. If you control more creatures of that type than each other player, you gain control of all creatures of that type. <I>(This effect lasts indefinitely.)</I>

Deathtouch

As Plague Engineer enters, choose a creature type.

Creatures of the chosen type your opponents control get -1/-1.

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)

As Radiant Destiny enters, choose a creature type.

Creatures you control of the chosen type get +1/+1. As long as you have the city's blessing, they also have vigilance.

As Rally the Ranks enters, choose a creature type.

Creatures you control of the chosen type get +1/+1.

As Reflections of Littjara enters, choose a creature type.

Whenever you cast a spell of the chosen type, copy that spell. (A copy of a permanent spell becomes a token.)

, Sacrifice Riptide Shapeshifter: Choose a creature type. Reveal cards from the top of your library until you reveal a creature card of that type. Put that card onto the battlefield and shuffle the rest into your library.

Choose a creature type. Roar of the Crowd deals damage to any target equal to the number of permanents you control of the chosen type.

As Secluded Courtyard enters, choose a creature type.

: Add .

: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type or activate an ability of a creature source of the chosen type.

As Species Specialist enters, choose a creature type.

Whenever a creature of the chosen type dies, you may draw a card.

As Steely Resolve enters, choose a creature type.

Creatures of the chosen type have shroud. (They can't be the targets of spells or abilities.)

As Three Tree City enters, choose a creature type.

: Add .

, : Choose a color. Add an amount of mana of that color equal to the number of creatures you control of the chosen type.

Choose a creature type. Target player reveals their hand and discards all creature cards of that type. Then destroy all creatures of that type that player controls. They can't be regenerated.

: Choose a creature type other than Wall. Target creature becomes that type until end of turn.

As Vanquisher's Banner enters, choose a creature type.

Creatures you control of the chosen type get +1/+1.

Whenever you cast a creature spell of the chosen type, draw a card.