Everything in the Seize Control Commander deck: all 100 cards with current prices, what the deck is worth against the sealed price, the 15 new cards, and whether it is worth buying.
Whenever you cast an instant or sorcery spell with mana value greater than the number of experience counters you have, you get an experience counter. Instant and sorcery spells you cast cost {1} less to cast for each experience counter you have.
At today's prices the singles come to $73.38, carried by Mizzix's Mastery ($7.80), Jace's Archivist ($7.33), Blatant Thievery ($5.84). 15 of the 100 cards are new to this deck. Draftsim's Commander 2015 review covers whether it is worth the sticker price.