What do all the rarity symbols mean?

[Ulairi]

I know what C, U, and R, are but what about X and the others?

[HunterS]

C = Common
U = Uncommon
R = Rare
X = X Rarity indicates alternate arts and just slightly rarer than regular rare
V = Very Rare
W = We Destroyed Most Of These

[Bithlord]

Originally Posted by HunterS

C = Common
U = Uncommon
R = Rare
X = X Rarity indicates alternate arts and just slightly rarer than regular rare
V = Very Rare
W = We Destroyed Most Of These

X also indicates the rarest card in the game (Ace of Spades). No details have been provided regarding the actual rarity (e.g. 1 out of every 8 packs in magic has a mythic rare instead of a rare) of the various levels other than their position.