>Come back up just a little, let our ears lead and tell us the coast is clear first. If it is, get a breath.
>You surface high enough to listen for more incoming attacks. You hear one tether being whipped back across the water's surface with another angling downward from above, but you think you have time enough for a quick breath. You take it, then submerge again.
>Once we draw a decent breath, go under again, far enough to grab that sword.
>If we manage to grab it this time, slice ourselves free of that webbing.
>Don't just grab it, though. No need to hack our hand open.
>You dive deeper, feeling around for the sword. Your treasure sense is frustratingly imprecise for doing this blind, but at least you know it hasn't been carried downstream. Your right hand scoops through the water, feeling for anything the sword could have landed on. Still nothing... nothing... You brush against a rock and quickly work your fingers across its surface. Still nothing... Your left arm is getting nearly as stretched as it can now, affixed to the webbing above you while you reach out with your other arm.
>You hear another sharp splash from somewhere above you, followed by something coursing through the water toward you.
>There! That's the blade! Your feel your fingers brush against the sharp edge, likely propped up along another fallen rock.