Brom, the Witch King

Your Hero's color identity includes your choice
of Black, Blue, or White.
At the beginning of your upkeep, look at the top
six cards of your library. You may exile up to
three cards of different card types from among
them and put the rest on the bottom of your
library in a random order. For as long as those
cards remain exiled, you may cast them. Those
spells have undaunted. (They cast {1} less to cast
for each opponent.)