As Dredge touched the dagger, the knights head snapped violently to stare upon him, but acted no more.
When he tossed it to Viggo, the knights head snapped once more, now changing its posture to witness the actions of the two better.

The daggers pentagrams lit up momentarily as Dredge let go of it, the sickening black ash slowly poured from its inside and swirled gently as Viggo held it in his hand.

The knight knew not why, but felt that the dagger was important somehow, that it had to do with the binding.
A rumble was heard from the growing cloud in the distance.