Olivia, Empress of Innistrad

When Olivia, Empress of Innistrad enters the battlefield, create two 2/3 black Vampire Guard
tokens with flying.
Sacrifice a noble: Search your library for a noble
and put it into your hand.
{3}: X cards and lose X life, where X is the
number of nobles you control.
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She can give someone the role of a noble as fast as she
can depose of another.