Mindscathe Crawler

When Mindscathe Crawler enters the battlefield,
you may pay 2 life. If you do, look at the top
three cards of your library. Put one of them into
your hand and the rest into your graveyard.
At the beginning of each end step, if more than
two creatures died this turn, return Mindscathe
Crawler from the graveyard to the battlefield
under its owner's control.