Spherical geometry, an Uncommon card

The card carries these facts from its Wikipedia article.

• Long studied for its practical applications to astronomy, navigation, and geodesy, spherical geometry and the metrical tools of spherical trigonometry are in many respects analogous to Euclidean plane geometry and trigonometry, but also have some important differences.
• The sphere can be studied either extrinsically as a surface embedded in 3-dimensional Euclidean space, or intrinsically using methods that only involve the surface itself without reference to any surrounding space.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Spherical geometry 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 61 and blocks with 41: 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 Spherical geometry in the power ranking, all domains together.