Chordate, an Epic card

The card carries these facts from its Wikipedia article.

• All chordates possess, at some point during their larval or adult stages, five distinctive physical characteristics that distinguish them from other taxa: a notochord, a hollow dorsal nerve cord, an endostyle or thyroid, pharyngeal slits, and a post-anal tail.
• In addition to the morphological characteristics used to define chordates, analysis of genome sequences has identified two conserved signature indels in their proteins: cyclophilin-like protein and inner mitochondrial membrane protease ATP23, which are exclusively shared by all vertebrates, tunicates, and cephalochordates.
• These CSIs provide molecular means to reliably distinguish chordates from all other animals.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Chordate article was read about 740,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 79 and blocks with 86: each hit it takes is cut by 34 %.

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 Chordate in the power ranking, all domains together.