Zulchaz, Pale Acolyte of Ugin

Instant and sorcery spells you cast cost {u}{r} less to cast. This effect only reduces the amount of coloured mana you pay. (For example, if you cast an instant or sorcery spell with cost {2}{u}, it costs {2} to cast.)
In the aftermath of the war, izzet mages set about replicating the magic of the planeswalkers they had seen in action.