House Supremacy

When House Supremacy enters the battlefield,
choose one: Surveil 2, or each opponent puts the
top two cards of their library into their graveyard.
Whenever a black or blue creature you control
deals damage to a player, you may pay {u/b}. If you
do, that player puts the top two cards of their
library into their graveyard, then you may exile
target noncreature spell from that player's
graveyard and cast a copy of the exiled card
without paying its mana cost.