Thermodynamic cycle, an Uncommon card

The card carries these facts from its Wikipedia article.

• In the process of passing through a cycle, the working fluid may convert heat from a warm source into useful work, and dispose of the remaining heat to a cold sink, thereby acting as a heat engine.
• Conversely, the cycle may be reversed and use work to move heat from a cold source and transfer it to a warm sink thereby acting as a heat pump.
• If at every point in the cycle the system is in thermodynamic equilibrium, the cycle is reversible.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Thermodynamic cycle article was read about 25,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 64 and blocks with 49: 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 Thermodynamic cycle in the power ranking, all domains together.