Pidgeon process, a Common card

The card carries these facts from its Wikipedia article.

• The most common method involves the raw material, dolomite, being fed into an externally heated reduction tank and then thermally reduced to metallic magnesium using 75% ferrosilicon as a reducing agent in a vacuum.
• Overall the processes in magnesium smelting via the Pidgeon process involve dolomite calcination, grinding and pelleting, and vacuum thermal reduction.
• Besides the Pidgeon process, electrolysis of magnesium chloride for commercial production of magnesium is also used, especially for magnesite ores, which at one point in time accounted for 75% of the world's magnesium production.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Pidgeon process article was read about 7,600 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 60 and blocks with 53: each hit it takes is cut by 21 %.

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The cards just above and just below Pidgeon process in the power ranking, all domains together.