Viewshed, a Common card

The card carries these facts from its Wikipedia article.

• It includes all surrounding points that are in line-of-sight with that location and excludes points that are beyond the horizon or obstructed by terrain and other features.
• Conversely, it can also refer to area from which an object can be seen.
• A viewshed is not necessarily "visible" to humans, the same concept is used in radio communications to indicate where a specific combination of transmitter, antenna, and terrain allow reception of signal.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Viewshed article was read about 7,900 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 55 and blocks with 30: each hit it takes is cut by 12 %.

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 Viewshed in the power ranking, all domains together.