Umori, the Collector

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 {3} as a sorcery.)
As Umori, the Collector enters the battlefield,
choose a card type.
Deathtouch
Spells you cast of the chosen type cost {2} less to
cast.