Herald of Kozilek
{1}{U}{R}
Creature -- Eldrazi Drone
2/4
Devoid (~this~ has no color.)
Colorless spells you cast cost {1} less to cast.
Ugin, the Ineffable
{6}
Legendary Planeswalker -- Ugin
4
Colorless spells you cast cost {2} less to cast.
[+1]: Exile the top card of your library face down and look at it. Create a 2/2 colorless Spirit creature token. When that token leaves the battlefield, put the exiled card into your hand.
[-3]: Destroy target permanent that's one or more colors.