Shadowing Horror

Shadowing horror costs {1} less to cast if you cast a black creature or planeswalker spell this turn
if you control another black creature or planeswalker, shadowing horror returns to the battlefield tapped if destroyed, if that planeswalker is a Tar planeswalker it reenters the battlefield untapped
"i-it's f-following m-me, i-it cannot l-leave m-me" -Tar