Bio-FET, a Common card

The card carries these facts from its Wikipedia article.

• When charged molecules, such as biomolecules, bind to the FET gate, which is usually a dielectric material, they can change the charge distribution of the underlying semiconductor material resulting in a change in conductance of the FET channel.
• A Bio-FET consists of two main compartments: one is the biological recognition element and the other is the field-effect transistor.
• The BioFET structure is largely based on the ion-sensitive field-effect transistor, a type of metal–oxide–semiconductor field-effect transistor where the metal gate is replaced by an ion-sensitive membrane, electrolyte solution, and reference electrode.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Bio-FET article was read about 4,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 66 and blocks with 50: each hit it takes is cut by 20 %.

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 Bio-FET in the power ranking, all domains together.