Bragi of the Steppe

Partner with Bruhnir of the Sand (When this
creature enters the battlefield, target player may put
Bruhnir into their hand from their library, then
shuffle.)
Minotaur spells you own cost {1} less to cast.
At the beginning of your postcombat main phase,
add {r/w} to your mana pool equal to the number of tapped Minotaurs you control.