The tugging continued, whatever it was dwelling within the mist persistent in its terror streak.

The conjured ropes are successful in their attempt to secure your captive companion, but at what cost? The desperate tugging in both directions cause the ropes to tighten, the remnants of rope burn and bruising on his chest unavoidable. Perhaps worse. Most likely worse.

The well-timed Immobulus provides a glimmer of hope in this bleak situation, the forms ensnaring the screaming man's limbs temporarily stilled....but not for long. Just long though to kick oneself free were one's wits about them. Best to make haste before movement resumed. There would be no telling how the shapes in the mist would adapt next.

The dainty silvery patronus may lift some of the human spirits nearby, but it was unlikely to assist in the current battle against the forms surrounding you.

Is this even a battle that you can win? Perhaps the wiser choice would be to fall back...