Yxael, Spectral King

First Strike, Vigilance.
Whenever a spirit creature enters the battlefield,
choose one or both:
{1} {b}, you can search for an artifact or black enchantment, show it and put it in your hand.
{2} {u}, you draw a card and tap one you don't
control, that creature can't untap on its untap step.
After gaining power over souls, his empire threatens
eternal slavery