Umori, the Collector

Umori, the Collector

Legendary Creature - Ooze | Power/Toughness: 4 / 5 (CMC 4)
Companion -- Each nonland card in your starting deck shares a card type. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)
As Umori, the Collector enters the battlefield, choose a card type.
Spells you cast of the chosen type cost less to cast.