B cell, an Uncommon card

The card carries these facts from its Wikipedia article.

• They function in the humoral immunity component of the adaptive immune system.
• B cells produce antibody molecules which may be either secreted or inserted into the plasma membrane where they serve as a part of B-cell receptors.
• When a naïve or memory B cell is activated by an antigen, it proliferates and differentiates into an antibody-secreting effector cell, known as a plasmablast or plasma cell.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The B cell article was read about 67,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 70 and blocks with 82: each hit it takes is cut by 33 %.

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 B cell in the power ranking, all domains together.