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Cloud Key

Future Sight — rare

Artifact

Cloud Key rulings:

2021-03-19: The cost reduction applies only to generic mana in the cost of spells of the chosen type you cast.

2021-03-19: To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Cloud Key's ability). The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.

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$2.47

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Rating:

9.72/10

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Here are cards with similar text to Cloud Key:

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Archon of Valor's Reach

Creature — Archon (5/6)

Flying, vigilance, trample
As Archon of Valor's Reach enters the battlefield, choose artifact, enchantment, instant, sorcery, or planeswalker.
Players can't cast spells of the chosen type.

8.3 /10

$0.36

Herald's Horn

Artifact

As Herald's Horn enters the battlefield, choose a creature type.
Creature spells you cast of the chosen type cost less to cast.
At the beginning of your upkeep, look at the top card of your library. If it's a creature card of the chosen type, you may reveal it and put it into your hand.

9.9 /10

$4.05

Stenn, Paranoid Partisan

Legendary Creature — Human Wizard (2/2)

As Stenn, Paranoid Partisan enters the battlefield, choose a card type other than creature or land.
Spells you cast of the chosen type cost less to cast.
: Exile Stenn. Return it to the battlefield under its owner's control at the beginning of the next end step.

8.4 /10

$0.18

Umori, the Collector

Legendary Creature — Ooze (4/5)

Companion — Each nonland card in your starting deck shares a card type. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)
As Umori, the Collector enters the battlefield, choose a card type.
Spells you cast of the chosen type cost less to cast.

7 /10

$0.19

Vadrik, Astral Archmage

Legendary Creature — Human Wizard (1/2)

If it's neither day nor night, it becomes day as Vadrik, Astral Archmage enters the battlefield.
Instant and sorcery spells you cast cost less to cast, where X is Vadrik's power.
Whenever day becomes night or night becomes day, put a +1/+1 counter on Vadrik.

7.9 /10

$0.20

Morophon, the Boundless

Legendary Creature — Shapeshifter (6/6)

Changeling (This card is every creature type.)
As Morophon, the Boundless enters the battlefield, 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.

9.4 /10

~$11

Urza's Incubator

Artifact

As Urza's Incubator enters the battlefield, choose a creature type.
Creature spells of the chosen type cost less to cast.

9.8 /10

~$36

Council of the Absolute

Creature — Human Advisor (2/4)

As Council of the Absolute enters the battlefield, choose a noncreature, nonland card name.
Your opponents can't cast spells with the chosen name.
Spells with the chosen name you cast cost less to cast.

2.9 /10

$0.31

Invasion of Segovia // Caetus, Sea Tyrant of Segovia

Battle — Siege // Legendary Creature — Serpent (0/0)

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When Invasion of Segovia enters the battlefield, create two 1/1 blue Kraken creature tokens with trample.

Caetus, Sea Tyrant of Segovia

Noncreature spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting a noncreature spell pays for or one mana of that creature's color.)
At the beginning of your end step, untap up to four target creatures.

8.4 /10

$0.74

Eye of Ojer Taq // Apex Observatory

Artifact // Artifact

: Add one mana of any color.
Craft with two that share a card type (, Exile this artifact, Exile the two from among other permanents you control and/or cards from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)

Apex Observatory

Apex Observatory enters the battlefield tapped. As it enters, choose a card type shared among two exiled cards used to craft it.
: The next spell you cast this turn of the chosen type can be cast without paying its mana cost.

5.6 /10

$2.08

Oracle of Bones

Creature — Minotaur Shaman (3/1)

Haste
Tribute 2 (As this creature enters the battlefield, an opponent of your choice may put two +1/+1 counters on it.)
When Oracle of Bones enters the battlefield, if tribute wasn't paid, you may cast an instant or sorcery spell from your hand without paying its mana cost.

5.3 /10

$0.22

Realmwalker

Creature — Shapeshifter (2/3)

Changeling (This card is every creature type.)
As Realmwalker enters the battlefield, 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.

9.8 /10

$3.59

Rowan, Scholar of Sparks // Will, Scholar of Frost

Legendary Planeswalker — Rowan // Legendary Planeswalker — W

Instant and sorcery spells you cast cost less to cast.
+1: Rowan, Scholar of Sparks deals 1 damage to each opponent. If you've drawn three or more cards this turn, she deals 3 damage to each opponent instead.
?4: You get an emblem with "Whenever you cast an instant or sorcery spell, you may pay . If you do, copy that spell. You may choose new targets for the copy."

Will, Scholar of Frost

Instant and sorcery spells you cast cost less to cast.
+1: Up to one target creature has base power and toughness 0/2 until your next turn.
?3: Draw two cards.
?7: Exile up to five target permanents. For each permanent exiled this way, its controller creates a 4/4 blue and red Elemental creature token.

7.8 /10

$2.54

Rukarumel, Biologist

Legendary Creature — Human Wizard (3/3)

As Rukarumel, Biologist enters the battlefield, 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.

6.2 /10

Sorcerer Class

Enchantment — Class

(Gain the next level as a sorcery to add its ability.)
When Sorcerer Class enters the battlefield, draw two cards, then discard two cards.
: Level 2
Creatures you control have ": Add or . Spend this mana only to cast an instant or sorcery spell or to gain a Class level."
: Level 3
Whenever you cast an instant or sorcery spell, that spell deals damage to each opponent equal to the number of instant and sorcery spells you've cast this turn.

9 /10

$0.75

Space Marine Devastator

Creature — Astartes Warrior (3/3)

Squad (As an additional cost to cast this spell, you may pay any number of times. When this creature enters the battlefield, create that many tokens that are copies of it.)
Grav-cannon — When Space Marine Devastator enters the battlefield, destroy up to one target artifact or enchantment.

7.9 /10

$0.17

Tenacious Tomeseeker

Creature — Human Knight (3/2)

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)
When Tenacious Tomeseeker enters the battlefield, if it was bargained, return target instant or sorcery card from your graveyard to your hand.

4.4 /10

$0.01

Urza, Planeswalker

Legendary Planeswalker — Urza

You may activate the loyalty abilities of Urza, Planeswalker twice each turn rather than only once.
+2: Artifact, instant, and sorcery spells you cast this turn cost less to cast. You gain 2 life.
+1: Draw two cards, then discard a card.
0: Create two 1/1 colorless Soldier artifact creature tokens.
?3: Exile target nonland permanent.
?10: Artifacts and planeswalkers you control gain indestructible until end of turn. Destroy all nonland permanents.

10 /10

Agatha's Champion

Creature — Human Knight (4/4)

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)
Trample
When Agatha's Champion enters the battlefield, if it was bargained, it fights up to one target creature you don't control. (Each deals damage equal to its power to the other.)

2.6 /10

$0.02

Alhammarret, High Arbiter

Legendary Creature — Sphinx (5/5)

Flying
As Alhammarret, High Arbiter enters the battlefield, each opponent reveals their hand. You choose the name of a nonland card revealed this way.
Your opponents can't cast spells with the chosen name (as long as this creature is on the battlefield).

4.7 /10

$0.12

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Cloud Key

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