Femto, Wings of Darkness

Flying, Lifelink
Whenever this creature transforms into Femto,
Wings of Darkness, you become the monarch.
At the beginning of your end step, if you are the
monarch, create a 2/3 black Demon creature
token.
{1}{p/b}{p/b}, Sacrifice another nontoken creature:
Regenerate Femto, Wings of Darkness.