Cr1TiKaL's

Tap, Sacrifice Cr1TiKaL's: Destroy target nonland permanent. You may
only use this ability once per turn, because Cr1TiKaLs don’t care for repetition.

When Cr1TiKaL's enters the battlefield, you
may search your library for a black card and
put it into your hand. If you do, shuffle your library.