The List

Urborg Panther

{B}, Sacrifice this creature: Destroy target creature blocking it.
Sacrifice a creature named Feral Shadow, a creature named Breathstealer, and this creature: Search your library for a card named Spirit of the Night, put that card onto the battlefield, then shuffle.

Mirage

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B, Sacrifice Urborg Panther: Destroy target creature blocking Urborg Panther.
Sacrifice Feral Shadow, Breathstealer, and Urborg Panther: Search your library for Spirit of the Night and put it into play as though it were just played. Shuffle your library afterwards.