Tharizdun, Nyxborn Horror

Tharizdun, Nyxborn Horrors power is equal to
your devotion to black
When Tharizdun, Nyxborn Horror enters the battlefield, if your devotion to black is less than
4, you lose 4 life and may search your library for
a creature card with converted mana cost 4 or less
and put it onto the battlefield. it loses all abilities and can't attack or block for as long as you control Tharizdun, Nyxborn Horror