Sequence, an Uncommon card

The card carries these facts from its Wikipedia article.

• Like a set, it contains members.
• Unlike a set, the same elements can appear multiple times at different positions in a sequence, and unlike a set, the order does matter.
• The notion of a sequence can be generalized to an indexed family, defined as a function from an arbitrary index set.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Sequence article was read about 110,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 73 and blocks with 52: each hit it takes is cut by 21 %.

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 Sequence in the power ranking, all domains together.