heros contains 249 cards (20 basic lands , 101 commons, 60 uncommons, 53 rares, 15 mythic rares), and includes randomly inserted premium versions of all cards. The set has an ancient Greek themed top-down design, making use of many mythological tropes (Heroes, Monsters and Gods). It is the first set to thematically take place on the plane of Theros. It is mostly monocolored with a handful of gold cards. Theros block is an enchantment block that plays off building blocks in M14 and Return to Ravnica block. The mood and tone are those of Greek myth: adventure, achievement, accomplishment, a hero’s journey. Many existing creature types are reworked to match the Greek flavor. Apart from Minotaurs, it’s not a tribal set. There are three Planeswalkers in the set, namely Elspeth and two new ones: Ashiok and Xenagos. There is an above average amount of legendary permanents. The expansion symbol depicts an stylized temple and altar.