Knot theory, an Uncommon card

The card carries these facts from its Wikipedia article.

• While inspired by knots which appear in daily life, such as those in shoelaces and rope, a mathematical knot differs in that the ends are joined so it cannot be undone, the simplest knot being a ring.
• In mathematical language, a knot is an embedding of a circle in 3-dimensional Euclidean space, E 3.
• Two mathematical knots are equivalent if one can be transformed into the other via a deformation of R 3 upon itself, these transformations correspond to manipulations of a knotted string that do not involve cutting it or passing it through itself.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Knot theory article was read about 110,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 78 and blocks with 61: each hit it takes is cut by 24 %.

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 Knot theory in the power ranking, all domains together.