Hemoglobin, a Rare card

Hemoglobin is a protein containing iron that facilitates the transportation of oxygen in red blood cells.
From the Wikipedia article

Rarity: Rare
Domain: Nature
ATK: 85
DEF: 91
Power: 176
Wikipedia reads a year: 300,000

Ranked #1,146 of the 3,000 cards of the base set by power (ATK + DEF).

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The facts on the card

The card carries these facts from its Wikipedia article.

Almost all vertebrates contain hemoglobin, with the sole exception of the fish family Channichthyidae.
Hemoglobin in the blood carries oxygen from the respiratory organs to the other tissues of the body, where it releases the oxygen to enable aerobic respiration which powers an animal's metabolism.
A healthy human has 12 to 20 grams of hemoglobin in every 100 mL of blood.

Why it is Rare

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Hemoglobin article was read about 300,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 85 and blocks with 91: each hit it takes is cut by 36 %.

How to get Hemoglobin

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.

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Cards close in power

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

Card lists

Credits

Text : Wikipedia, Hemoglobin (revision), CC BY-SA 4.0. Photo : Zephyris at English Wikipedia, CC BY-SA 3.0, Wikimedia Commons.