Take the right passage

Turning right, you wade even deeper into the water, until it's halfway up your chest. You're starting to wonder if it would just be faster to swim, when an eerie blue-green glow lights up the water in front of you. You don't see anything moving among the lights, and after a moment, you take a deep breath and duck under the water, blinking as the water stings your eyes.

At first, you can't see anything, then your vision clears and the sting goes away. You find yourself staring at a large, vining water plant, growing along the bottom of the corridor. The light comes from spots on the vines and leaves, though whether it's the plant itself glowing, or some creature that lives on the plant, you can't tell. It doesn't appear to be very dangerous, but then, neither did Tide, at first.

Suddenly, you realize that you've been underwater for quite a while, much longer than you can usually hold your breath for. Strange. You stay down, waiting to feel the familiar pressure in your chest as your oxygen-starved body demands air, but it never comes. Is this one of those spells the evil sorcerer said he cast upon you? Possibly, if he wanted to make sure you weren't accidentally drowned by one of his overzealous pets.

Whatever the reason, it does make it easier to swim past the plant. You are over the main mass of the thing when the tangled vines beneath you begin to quiver and squirm. You swim faster, but a cold, slippery vine reaches up and wraps around your ankle, pulling you down toward the bottom.