Thermo-hygrograph, a Common card

The card carries these facts from its Wikipedia article.

• Similar devices that record only one parameter are a thermograph for temperature and hygrograph for humidity.
• Thermographs where the variations are recorded using photography were described by several scientists as early as 1845, including Francis Ronalds who was Honorary Director of the Kew Observatory.
• An updated model of the initial machine was deployed across the national observational network set up by the new UK Met Office in 1867 and coordinated by Kew Observatory.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Thermo-hygrograph article was read about 2,900 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 34 and blocks with 13: each hit it takes is cut by 5 %.

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 Thermo-hygrograph in the power ranking, all domains together.