The design is super-archaic
Blake Rasmussen, Editor-in-Chief of DailyMTG.com, shares another reprint on his Twitter account, this time of Gatecrash 's Duskmantle Seer
You can activate one ability of a planeswalker you control once a turn, but only during a main phase when you would cast a sorcery
Every pack contains 5 cards of rarity Rare or higher and 4 Uncommon, 5 Common, and 1 Land cards, with a total of 12-13 Traditional Foil cards
Its easy to see why Elesh Norn, Grand Cenobite is middle on this list, rather than at the very top though and thats mostly due to her card cost, in our opinion, at 7 mana in total
Eternal Scourge I wouldnt be mentioning Eternal Scourge if Food Chain didnt exist, but Food Chain is certainly a card someone made for some reason, so I feel obligated to bring up the colorless creature that can loop with the enchantment to make infinite mana