Life-stealing Demonic Spearman, Margaras

[AUTO](RC):When this unit attacks, if you have a grade 3 or greater vanguard with "Favrneel" in its card name, this unit gets [Power]+5000 until end of that battle. [AUTO](RC):At the end of the battle this unit attacked, if you have a vanguard with "Purgatory" in its card name, put this unit into soul, and draw a card. [AUTO](Soul):When your grade 3 or greater vanguard with "Favrneel" in its card name is attacked, if the sum of the grades of «Dark States» cards in your soul is thirteen or more, bind this card, choose one of your opponent's rear-guards, and it gets [Power]-10000 until end that battle. You cannot bind cards with the same card name as this card until end of turn.