Aragonite, an Uncommon card

The card carries these facts from its Wikipedia article.

• It is formed by biological and physical processes, including precipitation from marine and freshwater environments.
• The crystal lattice of aragonite differs from that of calcite, resulting in a different crystal shape, an orthorhombic crystal system with acicular crystal.
• Repeated twinning results in pseudo-hexagonal forms.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Aragonite article was read about 80,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 65 and blocks with 60: 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 Aragonite in the power ranking, all domains together.