Seize Control

Seize Control is a 100-card Commander precon from Commander 2015, released November 13, 2015. It is led by Mizzix of the Izmagnus, an Izzet commander.

Mizzix of the Izmagnus

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 less to cast for each experience counter you have.

The list runs 39 lands and 14 creatures, and its nonland cards average 3.84 mana. At today's TCGplayer prices the whole deck's cards come to about $80.96, and the most valuable is Jace's Archivist at $8.15.