Emission nebula, an Uncommon card

The card carries these facts from its Wikipedia article.

• The most common source of ionization is high-energy ultraviolet photons emitted from a nearby hot star.
• Among the several different types of emission nebulae are H II regions, in which star formation is taking place and young, massive stars are the source of the ionizing photons, and planetary nebulae, in which a dying star has thrown off its outer layers, with the exposed hot core then ionizing them.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Emission nebula article was read about 32,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 48 and blocks with 38: each hit it takes is cut by 15 %.

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 Emission nebula in the power ranking, all domains together.