Avatar of Woe

Avatar of Woe {6}{B}{B}

Creature - Avatar | Power/Toughness: 6 / 5 (CMC 8)
If there are ten or more creature cards total in all graveyards, this spell costs {6} less to cast.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
{T}: Destroy target creature. It can't be regenerated.