Limestone, a Rare card

The card carries these facts from its Wikipedia article.

• It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate CaCO3.
• Limestone forms when these minerals precipitate out of water containing dissolved calcium.
• This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Limestone article was read about 390,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 81 and blocks with 100: each hit it takes is cut by 40 %.

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 Limestone in the power ranking, all domains together.