Ferrocyanide, an Uncommon card

The card carries these facts from its Wikipedia article.

• It is usually available as the salt potassium ferrocyanide, which has the formula K4Fe6. [Fe6]4− is a diamagnetic species, featuring low-spin iron center in an octahedral ligand environment.
• Although many salts of cyanide are highly toxic, ferro- and ferricyanides are less toxic because they tend not to release free cyanide.
• It is of commercial interest as a precursor to the pigment Prussian blue and, as its potassium salt, an anticaking agent.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Ferrocyanide article was read about 17,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 50 and blocks with 39: each hit it takes is cut by 16 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below Ferrocyanide in the power ranking, all domains together.