Crystallographic defect, an Uncommon card

The card carries these facts from its Wikipedia article.

• The positions and orientations of particles, which are repeating at fixed distances determined by the unit cell parameters in crystals, exhibit a periodic crystal structure, but this is usually imperfect.
• Several types of defects are often characterized: point defects, line defects, planar defects, bulk defects.
• Topological homotopy establishes a mathematical method of characterization.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Crystallographic defect 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 64 and blocks with 50: each hit it takes is cut by 20 %.

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 Crystallographic defect in the power ranking, all domains together.