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.
Mizzix of the Izmagnus (Commander 2015) (OVER-050) - Commander 2015 Oversized Foil
less to cast for each experience counter you have.
