Choose a creature type. Creatures you control of the chosen type get +1/+0 and gain indestructible until end of turn.

As Arcane Adaptation enters, choose a creature type.

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

As this artifact enters, choose a creature type. This artifact enters with a fellowship counter on it for each creature you control of the chosen type.

Creatures you control of the chosen type get +1/+1 for each fellowship counter on this artifact.

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.

If Leyline of Transformation is in your opening hand, you may begin the game with it on the battlefield.

As Leyline of Transformation enters, choose a creature type.

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

As Metallic Mimic enters, choose a creature type.

Metallic Mimic is the chosen type in addition to its other types.

Each other creature you control of the chosen type enters with an additional +1/+1 counter on it.

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

As Molten Echoes enters, choose a creature type.

Whenever a nontoken creature you control of the chosen type enters, create a token that's a copy of that creature. That token gains haste. Exile it at the beginning of the next end step.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

As Obelisk of Urd enters, choose a creature type.

Creatures you control of the chosen type get +2/+2.

Choose a creature type. Target creature gets -1/-1 until end of turn for each permanent of the chosen type you control.

As Patchwork Banner enters, choose a creature type.

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

: Add one mana of any color.

As Pillar of Origins enters, choose a creature type.

: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

As Progenitor's Icon enters, choose a creature type.

: Add one mana of any color.

: The next spell of the chosen type you cast this turn can be cast as though it had flash.

Choose a creature type. Return all creatures that aren't of the chosen type to their owners' hands.

Changeling (This card is every creature type.)

As Realmwalker enters, choose a creature type.

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

You may cast creature spells of the chosen type from the top of your library.

Vigilance

As Riders of Gavony enters, choose a creature type.

Human creatures you control have protection from creatures of the chosen type.

Ward

As Roaming Throne enters, choose a creature type.

Roaming Throne is the chosen type in addition to its other types.

If a triggered ability of another creature you control of the chosen type triggers, it triggers an additional time.

As Rukarumel, Biologist enters, choose a creature type.

Slivers you control and nontoken creatures you control are the chosen type in addition to their other creature types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

, : Create a 1/1 colorless Sliver creature token.

As Shared Triumph enters, choose a creature type.

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

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

As The Ringhart Crest enters, choose a creature type.

: Add . Spend this mana only to cast a creature spell of the chosen type or a legendary creature spell.

As Titan of Littjara enters, choose a creature type.

Titan of Littjara is the chosen type in addition to its other types.

Whenever Titan of Littjara enters or attacks, you may draw a card for each other creature you control that shares a creature type with it. If you do, discard a card.

As Unclaimed Territory 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.

As Urza's Incubator enters, choose a creature type.

Creature spells of the chosen type cost less to cast.

As Xenograft enters, choose a creature type.

Each creature you control is the chosen type in addition to its other types.