Cloud Key BRR

Card

id	13740
artist	Trevor Hairsine
artistIds	7c1d7b59-dbf1-4ca8-9975-8e01c593da6e
asciiName
attractionLights
availability	paper
boosterTypes
borderColor	black
colorIdentity
colorIndicator
colors
defense
duelDeck
edhrecRank	741
edhrecSaltiness	0.29
faceConvertedManaCost
faceFlavorName
faceManaValue
faceName
finishes	foil
flavorName
flavorText	"A key only unlocks a door. Its wielder must choose whether to cross the threshold." —Hurkyl's Metaphysics, vol. II
frameEffects
frameVersion	1997
hand
hasAlternativeDeckLimit
hasContentWarning
hasFoil	1
hasNonFoil	0
isAlternative	1
isFullArt
isFunny
isGameChanger
isOnlineOnly
isOversized
isPromo
isRebalanced
isReprint	1
isReserved
isStarter	1
isStorySpotlight
isTextless
isTimeshifted
keywords
language	English
layout	normal
leadershipSkills
life
loyalty
manaCost	{3}
manaValue	3
name	Cloud Key
number	75z
originalPrintings
originalReleaseDate
originalText
otherFaceIds
power
printings	BRR, EOC, FUT, PLST, TSR
promoTypes	serialized, doublerainbow
rarity	rare
rebalancedPrintings
relatedCards
securityStamp
setCode	BRR
side
signature
sourceProducts	{'foil': ['5d7ab4f0-6325-59ad-953c-b218569caa2a']}
subsets
subtypes
supertypes
text	As this artifact enters, choose artifact, creature, enchantment, instant, or sorcery. Spells you cast of the chosen type cost {1} less to cast.
toughness
type	Artifact
types	Artifact
uuid	6fc88962-b3f1-5a02-ab0c-6418e340d4a3
variations	c80a9d77-10e1-54f1-ae34-b22ddffb3dc1, 31789451-c3ea-5453-ae60-22519e3341fb
watermark	wotc
setName	The Brothers' War Retro Artifacts

id	13740
cardKingdom
cardKingdomEtched
cardKingdomFoil
cardmarket
tcgplayer	https://mtgjson.com/links/131ad68e48ef04fc
tcgplayerEtched
uuid	6fc88962-b3f1-5a02-ab0c-6418e340d4a3

No foreign data.

date	text
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.