Maklien, Grim Tracker

Morbid — At the beginning of each end step, if a creature died this turn, Investigate.
At the beginning of your end step, if you
sacrificed five or more Clues this turn, exile the
top five cards of your library. You may put a
creature card exiled this way onto the battlefield
under your control. Put the rest on the bottom
of your library in a random order.