Valos, The Double Minded

{t}{w}{w}{w}: create a three four Angel token with Flying and Lifelink onto the battlefield
{t}{b}{b}{b}{2}: create a three four Fallen Spirit token with First Strike and When this token enters the battlefield you may sacrifice target Angel token, if you do this creature gains a +1/+2 token and flying.
He betrayed us, left us like stray dogs, just to join the evil spirits of the underworld