Urza, Genius Mind

When Urza, Genius Mind enters the battlefield, search your library for an artifact, reveal it, then shuffle your library and put the revealed card on top of it.
{1}{r} or {1}{u}: Sacrifice an artifact, spells you cast cost {1} less until the end of your turn.
"We must safe this world from the true nemesis, WE WILL STAND AGAINST BOLAS!!"