Nazav, Master Necromancer

Partner with Urz, Unruly Corpse (When this creature enters the battlefield, target player may put Urz into their hand from their library, then shuffle.)
{t}: Target player draws a card, then discards a card.
Spells cast from graveyards cost {1} less to cast.
In life Nazav insisted on perfection in his students. In death, not much has changed.