Mizzix, League Attendant

Instant and sorcery spells you cast cost {1} less to cast if they're blue.
Instant and sorcery spells you cast cost {1} less to cast if they're red.
As long as Mizzix, League Attendant is in your command zone, instant and sorcery spells you cast cost {1} less to cast for each instant or sorcery card in your graveyard with the same converted mana cost as that spell.