Johann Euler, an Uncommon card

The card carries these facts from its Wikipedia article.

• The eldest son of the renowned mathematician Leonhard Euler, he served as professor of physics at the Imperial Academy of Sciences in Saint Petersburg and later as secretary of conferences overseeing the Academy's correspondence.
• His work Disquisitio de Causa Physica Electricitatis represented one of the earliest attempts to mathematize electrical theory through a mechanical framework based on compressible, elastic aether.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Johann Euler article was read about 30,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 49 and blocks with 25: each hit it takes is cut by 10 %.

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 Johann Euler in the power ranking, all domains together.