Arthur Cayley, an Uncommon card

The card carries these facts from its Wikipedia article.

• He helped found the modern British school of pure mathematics, and was a professor at Trinity College, Cambridge for 35 years.
• He postulated what is now known as the Cayley–Hamilton theorem, that every square matrix is a root of its own characteristic polynomial, and verified it for matrices of order 2 and 3.
• He was the first to define the concept of an abstract group, a set with a binary operation satisfying certain laws, as opposed to Évariste Galois' concept of permutation groups.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Arthur Cayley article was read about 29,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 64 and blocks with 35: each hit it takes is cut by 14 %.

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 Arthur Cayley in the power ranking, all domains together.