Calcium, a Rare card

The card carries these facts from its Wikipedia article.

• As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air.
• Its physical and chemical properties are most similar to its heavier homologues strontium and barium.
• It is the fifth most abundant element in Earth's crust, and the third most abundant metal, after iron and aluminium.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Calcium article was read about 250,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 76 and blocks with 96: each hit it takes is cut by 38 %.

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 Calcium in the power ranking, all domains together.