Commander Masters

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 {1} less to cast for each experience counter you have.

Double Masters 2022

Judge Gift Cards 2021

The List

Legendary Cube Prize Pack

Commander 2015

Whenever you cast an instant or sorcery spell with converted mana cost 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.