Ericsson cycle, a Common card

The card carries these facts from its Wikipedia article.

• He is credited with inventing two unique heat engine cycles and developing practical engines based on these cycles.
• His first cycle is now known as the closed Brayton cycle, while his second cycle is what is now called the Ericsson cycle.
• Ericsson is one of the few who built open-cycle engines, but he also built closed-cycle ones.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Ericsson cycle article was read about 11,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 61 and blocks with 43: each hit it takes is cut by 17 %.

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 Ericsson cycle in the power ranking, all domains together.