Kozilek, the Great Distortion PRM

Card

id	78509
artist	Jaime Jones
artistIds	92f6c2c1-fa57-4b52-99c4-0fd866c13dc9
asciiName
attractionLights
availability	mtgo
boosterTypes
borderColor	black
colorIdentity
colorIndicator
colors
defense
duelDeck
edhrecRank	1330
edhrecSaltiness	1.52
faceConvertedManaCost
faceFlavorName
faceManaValue
faceName
finishes	foil
flavorName
flavorText
frameEffects
frameVersion	2015
hand
hasAlternativeDeckLimit
hasContentWarning
hasFoil	1
hasNonFoil	0
isAlternative
isFullArt
isFunny
isGameChanger
isOnlineOnly	1
isOversized
isPromo	1
isRebalanced
isReprint	1
isReserved
isStarter
isStorySpotlight
isTextless
isTimeshifted
keywords	Menace
language	English
layout	normal
leadershipSkills	{'brawl': False, 'commander': True, 'oathbreaker': False}
life
loyalty
manaCost	{8}{C}{C}
manaValue	10
name	Kozilek, the Great Distortion
number	62493
originalPrintings
originalReleaseDate	2016-11-23
originalText
otherFaceIds
power	12
printings	CMM, EA2, OGW, POGW, PRM, SLD
promoTypes
rarity	mythic
rebalancedPrintings
relatedCards
securityStamp	oval
setCode	PRM
side
signature
sourceProducts
subsets
subtypes	Eldrazi
supertypes	Legendary
text	When you cast this spell, if you have fewer than seven cards in hand, draw cards equal to the difference. Menace Discard a card with mana value X: Counter target spell with mana value X.
toughness	12
type	Legendary Creature — Eldrazi
types	Creature
uuid	1e8f10c7-0942-5130-a059-5825739a90b0
variations
watermark
setName	Magic Online Promos

No foreign data.

date	text
2016-01-22	If there's an {X} in the mana cost of the card you discard, that X is 0. Any {X} in the mana cost of the target spell will have whatever value was determined for it as the spell was cast.
2016-01-22	Kozilek's triggered ability checks to see if you have fewer than seven cards in hand when you cast it. Kozilek is on the stack at this time and not in your hand. If you don't, the ability won't trigger at all. If the ability does trigger, it will check again as it tries to resolve. If you have seven or more cards in hand at that time, the ability won't do anything.
2016-01-22	The mana value of a spell doesn't change, even if it's been cast using an alternative cost (such as an awaken cost). For example, the mana value of a Sheer Drop (a spell with mana cost {2}{W}) that's been cast for its awaken cost of {5}{W} is 3.
2016-01-22	To activate the last ability, there must be a legal target: a spell on the stack. That target will determine the value of X and the mana value of the card you discard. You can't activate the ability unless you can match the mana value of a spell on the stack to that of a card in your hand.